Other Worldly Crash

Shuffle all cards that are in your hand, graveyard,
and in exile, back into your Library.
Deal damage to target player equal to the number
of cards shuffled back into your library this way,
Switch Libraries with that player until the end
of your turn after next. You and that player may
use mana as though it were of any color until
the end of your turn after next turn,
draw seven cards.