Siren's Call [Beta Edition] Bird

Siren's Call [Beta Edition] BirdSet: 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.

if Mana Vault is tapped

{B}: Regenerate Sedge Troll

They become 6/6 Elemental creatures

put that card into your graveyard

If you don't

Set: Portal Three Kingdoms Type: Sorcery Rarity: Uncommon Cost: {1}{R} Rockslide Ambush deals damage to target creature equal to the number of Mountains you control

"While most overworlders fortunately don't realize this

Set: Battle for Zendikar Prerelease Promos Type: Creature — Cat Beast Rarity: Rare Cost: {4}{W}{W} Vigilance

Who Shelters All enters the battlefield tapped

remove all mire counters from a land that a mire counter was put onto with Cyclopean Tomb but that a mire counter has not been removed from with Cyclopean Tomb

and that player decides whether to flip again

Set: Unlimited Edition Type: Land — Mountain Forest Rarity: Rare ({T}: Add {R} or {G}