A mod that makes some mobs a little bit smarter and more challenging to fight. As of the latest release, it only modifies the behavior of witches.
The witch has gone back to university and earned their PhD in alchemy! Witches will now apply beneficial potion effects such as Speed, Invisibility, Strength, and Fire Resistance to hostile mobs around them. Beware invisible skeletons, buffed-up zombies, and speedy creepers when exploring!