Raven, Demonic Ascendant

Azarath Metrion Zinthos — {1}{u}: Choose one —
• Teleportation — Exile Raven, Demonic
Ascendant, then return it to the battlefield at the beginning of the next end step.
• Succumb {line} Put two dark counters on target
Darkness you control. If you don't control a Darkness, create a black Darkness artifact token.
• Unleash {line} Remove X dark counters from a
Darkness you control: Raven deals X damage to
any target.