Unfortunate Rainbow

You may pay {w}{u}{b}{r}{g} instead of paying this
card's mana cost.
Change Target player's life total to 10, that
player may pay {w}{u}{b}{r}{g} or {10} and
copy this spell, they may choose new targets
for the copy.
"Oh yuck, what is this stuff!? And where did that
rainbow come from just now?" - Falarnian Knight's
last words.