[@TheWindel]

after consideration and comparing it to other notes I made to others skills etc plus talking to others about it...this is the results:
-can only erase previous five minutes of one's memories (for now)
-will consume your energy from doing so
-forcing it on someone will consume a bit more energy than usual 

sorry but these are the only ways i can think of to make it balanced because everyone else have nowhere near an amazing ability like that...sorry!