Screamers

A Screamer, often referred to as a Screamer of Tzeentch or Sky-shark, is a daemonic beast of Tzeentch who resembles the mythical rays and skates that once inhabited the oceans of ancient Terra. How these Daemons remain aloft is something of a mystery, and they can navigate planetary atmospheres, the void of space, and the Immaterium with equal ease and speed. Some have theorised that they fly upon or swim through ambient Warp energy rather than upon actual air or water.