The Destroyer
One of the 3 mechanical bosses
Wings
Hallowed Armor, Demon Wings, and Frost Staff
Crafting Stations
New stations from V1.3
Sample
A sample of hard mode inventory
Turrets
Ballista and Catapult turrets in a Goblin encampment
Villagers
Witch Doctor and Wizard
Items Sample
A small sample of the functional items attainable
Unique Weapons
The Crystal vile shard and the Clinger staff
Skeletron Dungeon
Skeletron's Dungeon found in the overworld
Underworld
Ash Biome in the Underworld with a Demon
Villagers
New villagers including the Merchant, Guide, and Goblin Tinkerer
Enchanted Sword Shrine
Found just below the surface
Mimics
The 3 special biome specific mimics
Corruption Biome
The Corruption biome found in the overworld with Eater of Souls mobs
Brain of Cthulhu
The Brain of Cthulhu inside of a Crimson cave
The Hallow
The Hallow biome with a unicorn and a pixie