Eris Morn, Crota's Bane

Protection from Nightmares
When Eris enters the battlefield, choose between
Human, Hive or Nightmare creatures.
Creature cards of the selected type under your
control have haunt. When a haunted creature an
opponent controls dies, scry 1. If you reveal an
artifact card this way, you may pay {2}. If you do,
put it in your hand.