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Cankerous Thirst
Instant
If black mana was spent to cast this spell, you may have target creature get -3/-3 until end of turn. If green mana was spent to cast this spell, you may have target creature get +3/+3 until end of turn. (Do both if black mana green mana was spent.)
Nothing warms the bark on a chilly day like a draught of elf.
Rulings (8)
When you cast the spell, you choose its targets before you pay for it.
Aug 1, 2008
As you cast Cankerous Thirst, you must target a creature for the first effect and you must target a creature for the second effect. Both targets may be the same. As Cankerous Thirst resolves, you decide whether to apply either effect.
Aug 1, 2008
The spell checks on resolution to see if any mana of the stated colors was spent to pay its cost. If so, it doesn't matter how much mana of that color was spent.
Aug 1, 2008
Legality
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