Having been on the receiving end of Silas' attention more than once, Ellis is aware of it, how it becomes fixed. It becomes like the prick of a pin. Ellis considers that as much as he considers his answer, already aware that it will be disappointing.

"I don't know."

He has only ever seen blood magic performed from the opening of a palm or from what spills from a slashed throat. Would a slaughtered goat summon the same shift in the air?

"Goats don't travel well in the Deep Roads," is something of an explanation. All Ellis knows is what he's observed, and situationally, the opportunities have been limited.