Fills every biome except for the fungal caves with rats with extra health and level 3 wands. Are you a brave enough wizard to go into a mine filled with magic rats, that may not be the smartest spellcasters around, but they've got power and numbers. Are you a better spellcaster than a rat?

Possible planned updates:
Add more dangerous rats to the deeper biomes rather than the same mid-tier rats throughout the dungeon