usually just a mod that adds some trevor henderson's creatures to the game called Minecraft.
this mod adds a new undead creatures, few be in updates and some of them are currently when the update comes out and it does remains more undead creatures to the game
random mod that contains new stuff (as well as it was said before it makes better nature so real!!)
This mod is most likely to be Trevor Henderson Creatures, but no because the Siren Head Boss is the main mob
i'm a Make the Creatures
so likes the all aggro monsters
has The Mobs has Added Lighty