Siren's Call [Alpha Edition] Island Swamp Catastrophes happened so often at

Catastrophes happened so often at the mana rig that the viashino language had a special word to describe them

so grows my strength

Set: Alpha Edition Type: Land — Plains Swamp Rarity: Rare ({T}: Add {W} or {B}

When Knowledge Vault leaves the battlefield

Siren's Call [Alpha Edition] Island Swamp Catastrophes happened so often atSet: 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.