Siren's Call [Limited Edition Beta] 171 Set: Sun & Moon: Guardians

Set: Sun & Moon: Guardians Rising Type: Water Rarity: Ultra Rare Retreat cost: Colorless

Set: Sun & Moon: Celestial Storm Type: Metal Rarity: Holo Rare Retreat cost: Colorless

Set: Sword & Shield: Darkness Ablaze Type: Grass Rarity: Secret Rare Retreat cost: 0

but its effects are negated

Siren's Call [Limited Edition Beta] 171 Set: Sun & Moon: GuardiansSet: Limited Edition Beta 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.