Burst of Light

If {w} was spent to cast this spell, you gain 4
life. If {u} was spent to cast this spell, draw a
card. If {b} was spent to cast this spell, each
opponent loses 3 life. If {r} was spent to cast
this spell, Burst of Light deals 2 damage to
any target. If {g} was spent to cast this spell,
destroy target artifact.