Unleash the Storm

This spell is all colors.
Gain 7 life, draw a card, each opponent lose 6
life, deal 3 damage to a creature or planeswalker,
destroy target artifact or enchantment.
At the begging of the next upkeep pay
{w}{u}{b}{r}{g}, if you do not, you lose the game.
Rebound.
If this is this card is cast because of a rebound
effect you do not have to pay mana at the
begging of the next upkeep for this spell