Teferi's Downfall

Teferi's Downfall costs {1} less for each extra turn target player would take after their next end step
If a target player would take an extra turn after
this turn instead skip that turn, if a player would
take more than 3 extra turns, instead that player
loses the game.
Foresight few have, prodigious temporal magics, and
even the planeswalker spark
but still mortal enough to fail.