Takesie Backsie

Split Second (as long as this spell is on the stack,
players can't cast spells or activate abilities that
aren't mana abilities.)
Return target spell you cast to its owner's hand.
Each player untaps every mana source that was
used prior to the casting of this spell this turn.
If this card is played for the third time in a single
game, you lose the game.
Can I take that back?