- Not to be confused with Brill.
- "Don't make me breathe. There are spores in the air! Huge clouds of them. Can't you see them?"
Biiril is a Dunmer skooma addict residing in Ebonheart. He was talked into attempting to poison the Hist tree found in the Argonian quarters in the city by Rhavil Urano.
He was poisoning the Hist Tree in Ebonheart, and must be stopped to help the Argonians.
- He mentions the Wabbajack and Bravil when explaining who caused him to poison the tree.