Hydronuke

Draw 7 cards, gain 7 life, return up to 7 target
nonland permanents to their owner's hands,
exile up to 7 target planeswalkers, shuffle up
to 7 cards from your graveyard into your library,
put a permanent card with converted mana cost
7 or less from your hand into play, exile up to 7
target cards from an opponent's graveyard, and proliferate.