Reality Lapse

Until end of turn, players may cast spells as
though they had flash without paying their mana
costs.
Exile up to two creatures, then return them to
the battlefield under target opponent's
control. Any player may then pay {x}. If they do,
that player may choose new targets for
this spell and repeat this process 10 - X times.
Remove up to ten counters from target
permanent or player.
Flashback {4}{p/u}{p/u}{p/b}{p/b}