Deathbringer Regent [Commander 2017] 167 {W}{U}: Azorius Keyrune becomes a

{W}{U}: Azorius Keyrune becomes a 2/2 white and blue Bird artifact creature with flying until end of turn

{3}: Dire Mimic becomes a Shapeshifter artifact creature with base power and toughness 5/5 until end of turn

or on the battlefield under your control

return another target creature card with mana value less than or equal to Gurgling Anointer's power from your graveyard to the battlefield

The pits have their own form of mercy

Deathbringer Regent [Commander 2017] 167 {W}{U}: Azorius Keyrune becomes aSet: Commander 2017 Type: Creature Dragon Rarity: Rare Cost: {5}{B}{B} Flying When Deathbringer Regent enters the battlefield, if you cast it from your hand and there are five or more other creatures on the battlefield, destroy all other creatures.