Bargain of Unwinding Time

You attempt to to turn back the time using your devilish powers. Roll a 2d10 and add your Spellcasting Modifier. If the roll is equal to or higher than 10+ the spell level of a spell you cast on your last turn, you cast that that spell spell again.

Bargain. If you fail the roll, your magic leaves you. For the next minute, you cannot cast spells of 4th level or higher.