If a split card gains flashback, you pay only the cost of the half you're casting
When the last is removed, sacrifice it.) When Crack in Time enters the battlefield and at the beginning of your precombat main phase, exile target creature an opponent controls until Crack in Time leaves the battlefield
It was initially pretty bad, but has been tuned to be interesting addition to the game
The raw power of the Prime-Time deck is just staggering at times
However, keeping a Rafiki, Mysterious Sage can help you make an early swing for board control on turn three
We can then really lean into the exchange theme, taking it to the next level with cards that exchange things other than creatures, like life totals (although maybe well skip the $700 Mirror Universe)