Ulamog, King of Eldrazi

0: Until the end of the turn Ulamog, King of Eldrazi is a 13/13 Eldrazi. Prevent all damage that would be done to Ulamog this turn.
-2: Create four 1/1 Eldrazi Scion tokens with "Sacrifice this creature: add 1 to your mana pool."
-5: Sacrifice five 1/1 Eldrazi Scion tokens, regenerate five creatures from your graveyard.