Skill Mechanics; "Encounter" Skills

I figured that your skills and various other cards would be face up on the table, since there is very little reason to keep them in hand. Not much point hiding your stuff from the other players your likely suppose to be working together with, so I'd go with a token for symbolizing a card has been used instead. That way the retrieve condition is still visible (I'd probably forget the card even existed if its face down, playing Yugioh was rather hard ^^) and you could have significantly more varied retrieve or, as I'd likely call it, refresh timers, like measurable in turns, or multiple combats. If something takes 2 combats to refresh, just stick two tokens on it and remove one each time a combat ends.

Also you could have skills that have no combat powers that are usable once per scene. Like letting you reflip a failed charisma flip to convince someone of a lie and it then refreshes at the start of the next scene.