Eldariel, The Fury

First-Strike, Lifelink, Demonic Essence 8

When Eldariel is summoned, summon Three 0/3 Black Chain Creature Tokens. For each Chain Creature on your battlefield, Eldariel has -2/-0. If there are no Chain Creatures on your battlefield, grant Eldariel Double-Strike

Each time one of the below is achieved by You, you may sacrifice a Chain Creature on your battlefield
• You summon a Son of the Second Circle
• A Demonic Essence cost is paid for a Greater Demon you control