The Mini Bosses Mod adds new mobs and special effects!
In this 1.7.2 Mini Bosses Mod Showcase:
This Minecraft Mod adds new bosses and mobs into Minecraft. The bosses themselves are extremely powerful and drop very useful items. Another feature of this mod is the rare versions of normal zombies, skeletons, and creepers. These mobs are much more powerful and have potion effects on them. However, if you kill them they may drop useful gear!
Get your Minecraft Mod here: