Lycanites Mobs a mod for Minecraft that will add dozens of creatures to your game . They are mostly hostile, and appear in specific biomes.
The author was inspired by various video games, such as Doom, Heretic, Hexen, Castlevania, Oddworld and Monster Hunter . The monster modeling is particularly neat, with non-cubic shapes that change from classic Minecraft, without, however, being too detached from the game world.
Given the immense content of the mod, we will discuss a classic presentation of the different creatures. If you want more details, I highly recommend that you take a look at the wiki which may have some useful information.