Where to find
On the corpse of a Cultist in Lower City SewersX: -116 Y: 834.
The wizard is a lunatic who already murdered one of his close companions out of sheer paranoia. It is likely none would believe his tale of the tadpoles, no matter what truth we saw.
But end him all the same. Orin will brook no failure when we are so close, and even so lost a soul will make a fine offering to our Lord.