Level 10 Genie Warlock
You don't always get what you want, and you are sure to remind your enemies of this. Anytime a creature you see within 60 ft succeeds on an attack roll, saving throw, or ability check, you may use your reaction to force them to roll another D20 and take the lower of the 2 rolls. If this doesn't change the outcome, then nothing happens, but if this does change the outcome, you may within the next minute give yourself or any creature within the range advantage on any attack roll, ability check, or saving throw as a free action. You may hold more than 1 instance of this, however the duration you have to spend it is individually decided.
You may use this feature proficiency modifier amount of times per long rest. and all charges are refreshed onna long rest.