A Ribbit of Problem
Find the Mighty Throg hanging about the swamp. Seems reasonable.
This is another quest where you follow the questgiver around, beating up mobs of enemies, but in this case the mobs are all rats.
They have no health levels or special powers, so just slaughter them like a lowbie grinding for XP. Ground pound attacks work well, but nothing works poorly. Continue to follow Throg through Medieval England until the threat is vanquished, and Throg himself is unlocked for purchase.