Seris, Oracle Of The Abyss

Ward—discard a card
Pay 2 Life: Put a soul counter on a creature your opponent controls, activate this only once per turn
{3}{b}{t}: Deal damage to each creature with a soul counter on it equal to Seris, Oracle Of The Abyss's power, for each creature that dies this way it's controller loses 1 life and you gain 1 life