Flamer of Tzeentch
From Warhammer - The Old World - Lexicanum
Flamers are slightly more powerful, with numerous gaping maws that produce the searing flames which give these daemons of Tzeentch their unsubtle name. They tend to accompany Horrors of Tzeentch in battle or form small units of skrimishers. Witnesses described them as inverted mushrooms, with a trunk that split into two arms.
Some of them ride on Discs of Tzeentch and become Messengers of Change that way. Some other Flamers drive the flying Chariots of Tzeentch that are pulled by Screamers of their God.