Zertorme from "Forbidden Lands" TTRPG by Observer Tree Studio.

"Zertorme is said to be the sorcerer Zygofer’s very own son. When the father caught Zertorme snooping about in his demonic grimoires he is supposed to have torn the face off his son, as beautiful as he was skilled in magic, as punishment. Zertorme then fled east to ally with his father’s enemies. From the plains, he is said to lead his armies with a masked visage and to have gathered the horse clans from Aslene, who believe him to be the prophet of the volcano god Horn and the future savior of Aslene, under his banner"