Hour of Retribution

You may pay {w}{u}{b}{r}{g} rather than pay
this spell's mana cost.
Rebound (If you cast this spell from your hand,
exile it as it resolves)
Anytime, you or your opponents have less than
10 1ife then Hour of Retribution becomes an
Enchant World (but remains an Interrupt in Exile.)
{w}{u}{b}{r}{g}: You gain 10 life, Gain control of
all creatures on the battlefield and they have
First Strike, Flying, Deathtouch, Haste, and
Trample until the end of turn.