Demonlord of Ashmouth [Avacyn Restored] 39 Set: Battle for Zendikar Type:

Set: Battle for Zendikar Type: Creature — Human Rogue Ally Rarity: Uncommon Cost: {1}{B} Whenever Zulaport Cutthroat or another creature you control dies

Set: Commander 2016 Type: Land Rarity: Uncommon Myriad Landscape enters the battlefield tapped

If this card is destroyed by battle or by your opponent's card effect while it is a Monster Card equip it to a monster your opponent controls during the End Phase of this turn

I believe they are the protectors of the lost secrets of our world

They have "Sacrifice this creature: Add {C}

Demonlord of Ashmouth [Avacyn Restored] 39 Set: Battle for Zendikar Type:Set: Avacyn Restored Type: Creature Demon Rarity: Rare Cost: {2}{B}{B} Flying When Demonlord of Ashmouth enters the battlefield, exile it unless you sacrifice another creature. Undying (When this creature dies, if it had no +1 +1 counters on it, return it to the battlefield under its owner's control with a +1 +1 counter on it.)