Siren's Call [Beta Edition] Commander 2014 Creatures can't attack you unless

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

When it dies

tap Yawgmoth Demon and it deals 2 damage to you

Set: Judge Gift Cards 2012 Type: Creature — Human Druid Rarity: Rare Cost: {G} Exalted (Whenever a creature you control attacks alone

where X is that spell's mana value

Siren's Call [Beta Edition] Commander 2014 Creatures can't attack you unlessSet: 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.