Siren's Call (Retro) [30th Anniversary Edition] H18 With one side a grey

With one side a grey PU material

Set: POP Series 2 Type: Grass Rarity: Rare Retreat cost: Colorless

If a Dinosaur is dealt damage this way

Set: Ixalan Prerelease Promos Type: Creature — Dinosaur Avatar Rarity: Rare Cost: {5}{G}{G} Whenever Verdant Sun's Avatar or another creature enters the battlefield under your control

Siren's Call (Retro) [30th Anniversary Edition] H18 With one side a greySet: 30th Anniversary 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.