SPIDER MOTH

Overworld-exclusive spawns - Vanilla biomes during thunderstorms. Avoids spawning near players that have killed it at full power. 

[BOSS]

Multiple phobias combine to create a nightmarish creature with high mobility, similar to Mothman folklore.

• Fully custom entity with intricate custom model, textures, particles, animations, and terrifying sounds
• Progressive terraria-like system where the naturally spawned entity will be weaker and disappear after a few hits until the player "wards it off" three times. From then on, it will spawn at full power for that player. If a player kills it twice at full power, it will stop spawning naturally near that player (but can still be summoned with the structure).
• Adaptive wing buzzing sounds that modulate in pitch and loudness based on movement speed.
• Multiple jumpscares/hallucinations
• Intelligent stalking and reaction to being looked at - it can track you across long distances (long render distance recommended). Spawns additional versions near to the player that follow closely or run away (despawning if not in darkness), stalk continuously with brief appearances, or fly around in the airspace near the player
• Ability to walk/run, fly anywhere, break out of blocks, and turn into smoke to pass through 1x1 spaces
• Ability to break doors, non-stained glass panes, and leaves, or drop torches to the ground on close contact. Mob griefing rules control these mechanics
• Flies over water, rather than getting stuck. Crash effect when landing from a height
• Multi-phase boss fight mechanics with second stage at half health (bloody texture + extra invisibility ability) - emits less and less particles as its health decreases. Variable hitbox size
• Lifesteal and damage blocking abilities
• Ability to grab onto entities and hold them in place, or throw them
• Can also spawn on cave walls or on large trees in a sleeping mode, easily woken up if approached without sneaking
• Summoning structure
• Eerie clones appear nearby to distract the player, with a chance to float into the sky. Variable sizes including enormous giants can spawn
• It can summon multiple types of minions, including ghosts that fly through walls and teleport it to you if you let them hit you (when it can't reach you otherwise). These teleporter ghosts also spawn naturally in crimson forests, and die if a block of mangled spider flesh is nearby.
• All attack phases are contained within a single entity, rather than spawning multiple versions
• Epic items as rewards for killing it, plus advancements

SCORPIOID BLOODLUSTER

Nether-exclusive spawns - Vanilla biomes during rain+thunderstorm cycles. Avoids spawning near players that have killed it, or haven't warded off the Spider Moth twice.

 [BOSS]

An ominous flying demonic entity that can stalk you in the nether, adding a true horror element there. It is a hybrid of a scorpion and a mosquito.

• Fully custom entity with intricate custom model, textures, particles, animations, and terrifying sounds
• Does not start spawning until you have "warded off" the overworld Spider Moth twice.
• Stalking mechanism includes a creepy airborne entity following you through the nether, teleporting closer occasionally.
• Flies by default, and is capable of crawling through walls slowly. Using walls/terrain to evade it is still a good option, as this ability slows it down significantly.
• Fires tendrils as a primary ranged attack. These can lifesteal and pull you towards the Scorpioid.
• Special attack ability 1: Temporarily creates a large spherical forcefield that repels attackers, gaining resistance and increasing its ranged tendril attacks.
• Special attack ability 2: It can split into three scorpioids in a multi-form technique, reforming after you kill the clones.
• Picks up entities while attacking.
• Occasionally, packs of hallucination clones can spawn that charge you down, teleporting through walls to get you, then disappear on contact.
• Shared with Spider Moth:
  - Adaptive wing buzzing sounds that modulate in pitch and loudness based on movement speed.
  - Hallucinations/jumpscares flashing on the screen
  - Intelligent stalking and reaction to being looked at - it can track you across long distances (long render distance recommended).
  - Second stage at half health (blue texture + more ranged attacks) - emits less and less particles as its health decreases.
  - Ability to break doors, non-stained glass panes, and nether/warped wart blocks, or drop torches to the ground on close contact. Mob griefing rules control these mechanics.
  - All attack phases are contained within a single entity, rather than spawning multiple versions
  - Epic items as rewards for killing it
  - Summoning structure

Planned additions: One more even more powerful boss version with spider moth pet as the reward for defeating, further sound improvements, another flying mode for the spider moth where it circles you like an enderdragon during the bossfight, and general further optimisations to every existing mechanic. Scorpioid will have another stalking version that spawns multiple inescapable hallucinations. Also planning to add one or two more "dweller"-style stalking entities, like a demonic flying stalker in the nether.

Planned: Locust swarms, regular moths, tameable butterflies. Segmented entities, especially for centipedes. Also planning countless improvements to existing entities, but not in a way that will make the mod become bloated. Planning to add a custom arthropod-infested biome with dungeons in it, or at least a large dungeon structure. Open to suggestions.

CURRENT:

Most added mobs can climb walls. Some of them can spawn in large groups.

---

Centipede Evictor [MINIBOSS] - Huge house/cave centipede boss with an intricate model and realistic animations. This large and extremely powerful boss entity can spawn larvae, and it can also spawn tiny centipedes that crawl through the walls to attack you. Therefore, it is called ‘Evictor’ because it will forcibly evict you from your home, just like a real house centipede might! It can see you through walls in order to do these attacks. Beware its extreme speed and strength - It will be necessary to use the environment to survive as it has a large hitbox. Drops a quarter of an Abyssal Crystal, providing an alternative way of obtaining it if you disable the main Dweller boss.

---

Widow spiders [MINIBOSS] - Huge black widow spiders that spawn rarely in dark forests and deep dark biomes. They are strong, with both melee and ranged attacks. Their ranged web attack is cumulative, giving the target a "webbed" effect that stacks up to level 5 if hit again before it expires. While its target is webbed, it keeps its distance (and is immune to projectiles). Additionally, it drops spinnerets, used to craft a web sling grappling hook that can upgrade further to a "tarantula tether".

---

Small spider larvae (house spider) entities can spawn in packs or be summoned by clones of the main dweller. They can jump and literally grab onto the player's head, inflicting continuous damage, or hang from the ceiling with realistic webs in wait of an unsuspecting victim. (colour and size variants)

---

Spider flat (giant huntsman) - Tameable! Large, fast spiders modelled after giant huntsman. Dangerous, strong, and highly creepy, but tameable with maggot or roach grubs (don't feed them the wrong food or they will be angry). When tamed, they follow and teleport like wolves, plus can be stored in a Spider Jar item. Fully renameable with nametags or anvil on the jar.

---

Funnel (web) spider mob can spawn rarely near spider larvae. They surprise the player by leaping from their hidden funnel web burrows when near - when killed, they drop a necrotic fang. Large and highly dangerous, giving a necrosis effect on hit that works like the opposite of resistance. [colour variants]

---

Goliath spiders (tarantulas) are the strongest non-boss spider-type. Four different variants. Variant 1 is a large goliath birdeater with strength and resistance (plus special ability to urticate, throwing hairs that cause blindness/slowness), variant 2 is another creepy brown tarantula that is immune to drowning, variant 3 is a dark, fast tarantula, and variant 4 is a Mexican red-kneed tarantula with immunity to fire. All tameable with buckets of maggots/roaches! Tamed versions are rideable and fight for you. When riding, you can climb walls or jump by pressing ctrl/cmd. [colour, ability, and size variations]

---

Brood spiders (wolf spiders) are large and drop off tiny spiders when attacked or killed. They have venomous melee attacks and ranged web attacks 

---

Lurker (sea) spiders - Large spindly water-based spider creatures that spawn near tropical fish, walking on the ocean floor. Not even the oceans are spider-free.

---

Centipede Evictor larvae - Extra-realistic centipede designs/animations. These small, rapid enemies spawn rarely in various biomes such as swamps and lush caves. On spawning, they have a one in five chance to be a darker cave centipede (instead of a house centipede), with black particles coming out. If you kill one of these while in a wide open space, that is how you spawn the main Centipede Evictor miniboss.

---

Centipede Stalker - Maximally creepy giant centipedes can spawn in various biomes, above and below ground. Fully animated with 20 body segments and 19 pairs of legs, along with stalking mechanics (around walls) and ability to hang off the ceiling until you get close. They drop venomous appendages on death.

---

Hornet Harbinger - Realistic hornet/wasp mobs that spawn in packs to hunt you down and sting you with necrosis and withering effects. Additional giant variant is larger and stronger, dropping a venomous fang on death. They attack bees.

---

Mosquito Morbidity - Highly realistic mosquito mobs. Weak, but don't ignore them as they have a chance to give you 30 seconds of poison on hit, like a cave spider. Hard to hit as they fly all around you. Abdomen fills with blood when attacking you. 

---

Smaller, regular spider moth larvae enemies with ranged and charge attacks can spawn from the main spider moth (whenever it kills any entity, or occasionally during the fight) - Their ranged attacks can heal the spider moth, so it is crucial to eliminate them.

---

Silverfish spectres are realistic versions of the silverfish mob, with an extra ability to go invisible periodically. [size variants]

---

Long Legs Fly (crane fly mob) is an aggressive flying creature with crazy unpredictable flight patterns. They're weak, but can be threatening due to these movements.

---

Spindly longlegs harvestmen/cellar spider arthropods rarely spawn, mostly underground in large packs. They are neutral mobs, becoming aggressive if attacked. [colour and size variants]

---

Menacing scorpion/sun-spider hybrids can spawn in various hot biomes like deserts. They have a chance to grab onto the player with their pincer upon landing a successful hit, along with having paralysing venom. They drop venomous appendages on death, plus have a rare chance to drop a fire opal shard. [colour and size variants]

---

Maggots/grubs that spawn rarely in packs of up to 40, each with random sizes. They poison the player on contact, and can be consumed as food or crafted into a bucket of maggots (8 grubs+bucket). (colour and size variants)

---

Cockroaches/water-bugs can spawn in various biomes, and can be consumed as food or crafted into a bucket of roaches (8 grubs+bucket). (colour and size variants)

---

Rhino beetles can spawn in caves and jungles. Their phobia element comes from an ability to randomly start flying with wings sticking out and a noisy buzzing sound.

---

Small ticks/beetles/mites can spawn similarly to cockroaches, adding additional variety with different spawn textures. They can jump to attack (colour and size variants). 

---

Giant ants spawn in groups, following each other over long ranges and fighting off attackers. (size variants)

---

Creepy bloodworms spawn rarely in groups, each with random sizes and detailed realistic animations. (transparency and size variants)

All crafting recipes

When the bosses are stalking you, they can give you a "Terror" effect (mining fatigue + occasional shaking):

They are powerful enough to kill wardens, withers, and other strong mod bosses, yet fully possible to defeat with vanilla (ideally ranged) weapons and craftable items that slow them down. Any naturally-spawned dweller will stalk you down, keeping at a distance until you look at them or walk too close. Once triggered, they run or fly at you aggressively, breaking any leaves, doors, or window panes in their way, or teleporting towards you if they get stuck. If you don't have the powerful tools necessary to kill them, you can get rid of them by dying to them, escaping to another dimension, or running far enough away that they despawn. 

- Bane of the Darkness: Prevents stalker bosses from stealing your health, in addition to providing immunity to darkness effects and slowing the Spider Moth.

- Mantle of Vitality: Provides immunity to wither, necrosis, and poison effects.

- Web Slinger and Tarantula Tether grapppling hooks: Web slinger crafts from spinnerets dropped by black widow minibosses. Pulls you to walls and lets you hang from them, or pulls entities towards you. You can upgrade it to a more powerful tarantula tether, with double the range and power.

- Thunder Sensor glows when a thunderstorm is happening, letting you know that the Spider Moth or Scorpioid Bloodluster could spawn at any time (Scorpioid also spawns in rain weather).

- Bug Repellant item is craftable with an glass bottle, amethyst, and lapis lazuli. It slows and withers nearby arthropods when placed on the ground, lasting for around a minute. The more max-health the arthropod has, the less it will be affected. 

- Dagger of Dissolution: Crafts from one necrotic fang (drop from funnel web spiders and giant hornets) and one venomous appendage (drop from sun scorpions and centipede stalkers). Like those mobs, it gives a necrosis effect on hit, acting like the opposite of resistance by amplifying damage taken to the affected entity and making them temporarily more vulnerable to all attacks. 

- Potions of Necrosis brewable with water bottle and necrotic fangs or venomous appendages. Splash, lingering, and arrow variants available.

Necrosis (anti-resistance) damage mutiplier: damage amount * ( (effect level + 3) / 2.5 )

Killing stalker bosses gives you powerful crystal and gem items that provide strength when held.

Killing the Spider Moth boss gives you an abyssal crystal that can craft with other items to produce legendary abyssal tools. These strong tools come with numerous special abilities and glow to warn when you are being targeted for attack.

• The abyssal blade is an unbreakable weapon capable of acting as a powerful sword, shield, ranged weapon, mobility item, and general protection item. It has further abilities, like weakening, slowing, and withering enemies, plus providing immunity to withering, necrosis, and darkness effects when held. You can wield two at once, or wield it with an abyssal crystal or dagger offhand for additional powerful abilities.
• The abyssal pickaxe is an unbreakable tool capable of mining two blocks at a time. Right clicking activates the double-break ability temporarily. If you have a Bane of the Darkness in your inventory, the right click also gives a minute of night vision. Right click with the Abyssal Blade (or upcoming Abyss Ascendant - also upgrades the efficiency level) in your offhand while this pickaxe is in your main hand for the option to temporarily switch from a fortune enchantment to silk touch. 
• The abyssal dagger crafts from the dagger of dissolution, serving as an upgraded unbreakable version of that item dealing a higher necrosis level on hit. It glows when targeted like the other abyssal tools, and provides invisibility when attacked along with slowing the attacker. 

Killing the Scorpioid Bloodluster boss gives you a fire opal gem that can craft with other items to produce valuable items, like staffs with powerful mobility-based abilities. 

• The ascendant staff is an unbreakable staff that provides immunity to fall damage when held, along with an ability to float high into the air when right clicked. Hitting mobs with it gives them levitation, making it an excellent defensive tool in multiple ways. Hitting
• The ethereal staff is another unbreakable staff that gives you the power to literally walk through walls on right click, along with providing strong immunity to suffocation when held. You can also use it to extend your jump distance, or hit mobs with it repeatedly to force them down into ground for suffocation. Hitting the ground places down a weaker (but unlimited) version of the bug repellant item.
• The block of fire opal crafts from nine fire opals, providing saturation to nearby players so you no longer even need to eat.

Summoning structure available for the stalker bosses - You need a Bane of the Darkness in your inventory. Then, simply place a block of soul sand atop a block of fermented spider eyes (for Spider Moth), or a block of scorpion flesh (for Scorpioid Bloodluster), and light it on fire:

Enjoy!

Credit to Ragled_Ramble for additional stalking mechanic ideas, SalmonMC for idea to add silverfish, and Sapphire Sophie for ideas to add scorpions and centipedes, along with some additional ideas for the existing entities. Srfoloso for suggesting the "In control" mod)