Siren's Call [Beta Edition] Alpha Edition Set: Amonkhet Invocations Type: Legendary

Set: Amonkhet Invocations Type: Legendary Creature — God Rarity: Mythic Cost: {2}{B} Menace

Set: Dominaria United Prerelease Promos Type: Legendary Creature — Phyrexian Praetor Rarity: Mythic Cost: {2}{B}{B} Deathtouch

It was an ancient defense of the Dwarves that could only be traversed in single file

Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {1}{R} Add {R}{R}{R}

where X is the amount of damage it dealt to that player

Siren's Call [Beta Edition] Alpha Edition Set: Amonkhet Invocations Type: LegendarySet: Beta 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.