Azathoth, Daemon Sultan

Flying, Lifelink, Annihilator 1
Whenever an opponent discards a card, you may
return a Great Old One from your graveyard to
your hand.
[O]utside the ordered universe [is] that amorphous
blight of nethermost confusion which blasphemes and
bubbles at the center of all infinity-the boundless
daemon sultan Azathoth. -H.P. Lovecraft, The
Dream Quest of Unknown Kadath