Siren's Call [Alpha Edition] Modern Masters 2015 you may sacrifice an artifact

you may sacrifice an artifact

War destroys hope

"Her hunger knows no limit

−2: Gain control of target creature until end of turn

Shamans of Kar-Sengir claim that their sun sets because it can no longer bear the gaze of those pain-carved cliffs

Siren's Call [Alpha Edition] Modern Masters 2015 you may sacrifice an artifactSet: Alpha Edition Type: Instant Rarity: 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.