Depends on how they implement it; if the source is limited it might take time for the energy to return so even if you are fully rested the amount of effort to pull that energy might be restricted. I'm sort of trying to make mana 2 dimensional instead of one - a reserve (source) and effort to pull it from that source (stamania). Because these are a bit more abstract then energy in a bottle you can't simply quaff a potion to replenish .
Well as I said earlier I (ok see the word I) would be curious if something like fatigue could increase as you case. ...
Wouldn't this sort of simply be like having mana regenerate to full after battle?
