Witch-King of Angmar

Flying, Realmwalk
Whenever Witch-King of Angmar attacks,
defending player discards two cards and mills two.
If you control Sauron, Lord of Mordor,
Witch-King of Angmar gets a +1/+1 and gains
of your choice Hexproof or Menace. If Sauron,
Lord of Mordor is not on the battlefield,
Witch-King of Angmar gets a -1/-1 and loses Realmwalk.