Siren's Call [Limited Edition Beta] Incarnation Whenever a creature an opponent

Whenever a creature an opponent controls with a -1/-1 counter on it dies

enchantments

As Steam Vents enters the battlefield

then draws seven cards

You lose life equal to its converted mana cost

Siren's Call [Limited Edition Beta] Incarnation Whenever a creature an opponentSet: Limited Edition Beta Type: Instant Uncommon Cost: {U} Cast this spell only during an opponent's turn, before attackers are declared. Creatures the active player controls attack this turn if able. At the beginning of the next end step, destroy all non Wall creatures that player controls that didn't attack this turn. Ignore this effect for each creature the player didn't control continuously since the beginning of the turn.