The twisted serial killer Muse is a relatively recent Marvel creation, set to make his debut in Daredevil: Born Again.

Created by writer Bill Mantlo and legendary artist George Pérez, who shared the hero's Puerto Rican heritage, Ayala was a street smart vigilante who used the power of three so-called Jade Tiger amulets which originated in Iron Fist's heavenly city of K'un-Lun to gain superhuman strength and agility.

Born Again is here, and if you're wondering about the mysterious masked White Tiger, you can learn about the character here.