Time Control

Target player takes an extra turn after this one.
Transmodify {6}{u}{u}{u}{u}{u} (You may cast this card for its transmodify cost. If you do, cast this card as an instant instead of a sorcery.)
If you cast Time Control for its transmodify cost, instead end the turn, then reverse the turn order. (The current player finishes their turn. After their turn is over turns resume in the opposite direction.)