Sap
A slime that spawns in forests.
Piston Crates
For those who miss them... if those people exist...
Mud Pig
Copied from Minecraft Earth, but like the Brown Mooshroom, it has a pre-1.14 inspired texture. They have a 1 in 7 chance of appearing whenever a pig is loaded. They also have a 1 in 7 chance of turning into a normal pig when loaded.
TNT Creeper
Unused at the moment. I'll probably add another boss that spawns them.
Fire Creeper
Enderman Skeleton
Imagine an enderman, and a skeleton... great, now combine them... congratulations, you just made the thing of my worst nightma-... I mean the enderman skeleton. It also shoots really fast.
Nether Reactor Core
While the old nether reactor core structure is built around this, it gives all entities within its radius fire resistance!
Party Creeper
I added them on my irl birthday. They spawn instead of creepers on my birthday.
Tarantula
A spider that spawns in jungle biomes. Also makes silk when it climbs anything.
Highland Coo
Spawns in plains biomes. Basically a sheep + cow.
Blestem
A very difficult mob that spawns everywhere in the end.
Mummy
Behaves like a skeleton. Can spawn with either a sword or bow by default.
Also comes in bop
Jack O'Lantern
NOT THE BLOCK!!! This is actually a slime that spawns in snowy biomes. Fun fact, this mod was first posted on Christmas, this really celebrates that...
Cluckshroom
A Cluckshroom in it's native habitat. It can spawn with both red and brown mushrooms by default.
Lapis Chicken
Also unused. Right click them with any item (while in creative) to make them lay that item instead of lapis. Also changes color to match the item it lays!
Also comes in bop
You can add any flowers to it via the config (including any modded ones)!
Mooblooms
Can spawn as any flower in vanilla! When they have access to rain and sunlight, they place their flower! They can be sheared to be converted into regular cows. The "grass" part of their texture also changes color to match the biome they're in!
Cake!
Stairs
Yes, these are all stairs! These also come in slabs!
Random previously unobtainable blocks
Lots of the armor
Nether Skeleton
No, wither skeletons aren't nether skeletons... those don't count...
More new crafting tables
New crafting tables & bookshelves
Brown Mooshroom
Copied from 1.14, but with a pre-1.14 inspired texture instead. Can also spawn in mushroom island biomes.
Red Dragon
It's basically the pre-1.9 ender dragon. Make sure not to spawn anywhere near any builds! Unless you hate a guy... you didn't hear that from me...
Nether ores
Some new ores, and some familiar ones that spawn in the nether.