Dol Dorn

Dol Dorn used to be the Cangelings beast God of the dead, until he, along with some of the other beast gods, were corrupted by Orcus.

Old Rituals
Long ago, before he was corrupted, the act of worshiping Dol Dorn involved taking one of his seeds and placing it in the mouth of the recently dead, and soon after a tree would sprout in it's place.

Use by Orcs
The orcs have been further corrupting Dol Dorn, shortening the time he spends hibernating and making his seeds far more potent. He has grown to the point that even his pollen can dominate the minds of the living. Thus far the orcs appear to be using him to enslave or quickly wipe out small settlements around the country.

Along with fresh meat, he also appears to feed off of certain types of minerals.