Biletoad

Biletoads are toad critters found in the Wailing Caverns, Sholazar Basin, and Northern Barrens. The little toad can cast Biletoad Infection, which sacrifices itself and reduces the size of nearby enemies for 3 minutes.

Pet Jounal
The rumors of the medicinal uses of the biletoad were believed to have been started by a particularly mischievous apothecary.