I edited more info into finesse, hopefully that's alright now.

Ethereal Charge is not a passive ability, however the only limitation I placed on it is Jake's endurance, the idea being that if he has the strength to fight, he has the strength to fight ethereal beings. If he's too mentally/physically exhausted to focus, he wouldn't be able to use this ability. There's also the fact that he must have a weapon in order to use this ability. Let me know if it needs more limitations.