See An imp of the perverse guide. Equip "a solid gold wish ring, stolen from a glittering demon" and say the name of an item made of gold.
'Redemption from the darkness' you say. You wish for it, and it is yours. Redemption from the Darkness emits a bright flare of white light as it binds with you. Redemption from the darkness appears in your inventory. For your part in the dissemination of chaos and madness, the Powers have granted thee a Mark. You have been granted the Mark of Entropy! You gain 100 practices!