Cut of Fate

You are able to change fate and reverse the most recent events of time. You may perform this spell to reverse 1 minute of time and bestow either advantage or disadvantage on a target you can see for their next roll of any type. 
Only the caster is aware of the shift in fate and is able to remember the prior events after the spell is used. The caster must make a wisdom saving throw (DC 18). On a failure the caster is stunned and rolls on the madness table (DM alternate table). The caster takes 1 hit die of damage immediately after casting the spell regardless of success or failure.