You can add biomes that is found in the End in here.
|Enderhills||Extreme hills biome, but made out of endstone||common||
|Endermen, Ender-zombies, Ender Soldiers, Enderknights|
|Dragon's Nest||Mini-Biome made of bone cluster blocks, endergoo oozes around||Extremely
hardened endergoo ingots , enderman
|Endermen, endermites, baby dragon trio boss|
|Ender Castle||the place is extremely dangerous so you need stronger than diamond armor.||Super rare||Ender bricks, Ender fences, Endermen spawners, Dragon eggs.||Ender King,
Ender builder, Ender cook.