Name:Massacre
ManaCost:2 B B
Types:Sorcery
S:Mode$ AlternativeCost | ValidSA$ Spell | ValidCard$ Card.Self | ValidPlayer$ You | Cost$ 0 | EffectZone$ All | CheckSVar$ X | CheckSecondSVar$ Y | Description$ If an opponent controls a Plains and you control a Swamp, you may cast this spell without paying its mana cost.
SVar:X:Count$Valid Plains.OppCtrl
SVar:Y:Count$Valid Swamp.YouCtrl
A:SP$ PumpAll | ValidCards$ Creature | NumAtt$ -2 | NumDef$ -2 | IsCurse$ True | SpellDescription$ All creatures get -2/-2 until end of turn.
Oracle:If an opponent controls a Plains and you control a Swamp, you may cast this spell without paying its mana cost.\nAll creatures get -2/-2 until end of turn.
