Sword of Spirit
Legend
...that means anything at least an hour, but less than eight hours, could be called a Short Rest by the DM. So that four-hour break the party took? Just a Short Rest...
And I'd revolt if a DM tried to run it that way. It's ridiculous because it provides no way to indicate when your time validly "resets" so that a new short rest can be taken. Do you have to have combat? How about sparring? How about running around and jumping a bit?
I mean even in 4e, the D&D poster child for that sort of mechanic, out of combat your "encounter" powers recharged after 5 minutes.