Unearthly Boon

For every {r} spent to cast this spell deal 2
damage to target player or permanent. The same
goes for {w} and gaining 2 life or preventing 2
damage, {u} and drawing a card, {b} and adding {b}{b}, {g} and giving target creature +2/+2 until
end of turn. Then exile this spell.
If you spend two or more mana of one color to
cast this, those effects resolve simultaneously. Otherwise they resolve in any order you choose.