Siren's Call [Beta Edition] Commander 2014 where X is that spell's

where X is that spell's mana value

tap Yawgmoth Demon and it deals 2 damage to you

Zuo Ci exhibited the mystic's ability to "shrink the land

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you

The *Weatherlight* dragged the *Predator* behind it

Siren's Call [Beta Edition] Commander 2014 where X is that spell'sSet: 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.