Voss said:
That door example is closer to the truth.
If you have a crappy DM that enjoys being a dick by getting you to use a limited resource (if buffs like that are per-day instead of per-encounter). No self-respecting DM I know would do that to his players. It reminds me of the DM that thinks it's his job to
beat his players, not make the game fun for all involved.
If there is something special about the door (a lock, trap or something else that needs to be bypassed or dealt with) it *will* be an encounter. Depending on how they do it it can even be a leveled encounter with rewards and challenges just like any other.
Or kicking open the door is the start of an encounter with the gnolls on the other side of it. If the DM has the player use up a buff to kick open the door to an empty room, then that DM is just an asshat.
General thought on this design- this is an extremely gamist approach, and isn't going to sit well with some people.
Some people are never satisfied. It's a game, so gamist design isn't anything outrageous. Vancian magic was an incredibly gamist design, but since it's a "sacred cow," that makes it okay to most "anti-gamist" types.
Some want the defined parameters that a round or minute based duration provides.
Then, as the DM, they can determine it. Or ask their DM to do so if they're a player.
If reinforcements arrive in a battle, is it the same encounter?
If it's the same fight, why would it be a different encounter? My first fight with the orcs doesn't suddenly turn into my second fight with the orcs just because their friends show up.
Where is the cut off? 1 round later? 2? or what if they're waiting, invisible but present for the entire battle? Is it a new encounter just because the party failed to detect them?
These are questions for your DM. It's up to him to determine what counts as an encounter, when they end, and what you get for them. This is no different than the DM making an arbitrary call about your flight duration ending since it's been a few hours (even though it's only been a few minutes OOC).