Ob Nixilis, Captive Kingpin

Choose target permanent card in your graveyard. If it has mana value 3 or less, you may put it onto the battlefield. If you don't put it onto the battlefield, put it into your hand. You gain 3 life.

Flying, vigilance You have hexproof. Whenever this creature is dealt damage, you gain that much life.

Vigilance, trample, lifelink Once during each of your turns, you may cast an Aura or Equipment spell from your graveyard.

When this creature enters, you may pay G up to three times. When you pay this cost one or more times, choose up to that many — • Destroy target artifact or enchantment. • Exile target player's graveyard. • You gain 4 life.

Haste Whenever this creature attacks, look at the top six cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Vigilance Whenever this creature deals combat damage to a player, return target artifact or enchantment card from your graveyard to the battlefield.

Whenever a creature you control attacks or enters attacking, you may pay 1R. If you do, you may put a creature card with mana value less than that creature's mana value from your hand onto the battlefield tapped and attacking.

Dragon spells you cast cost 1 less to cast. Whenever a Dragon you control enters, you may have Sarkhan become a copy of it until end of turn, except its name is Sarkhan, Soul Aflame and it's legendary in addition to its other types.