Activity bar in Soul Wars for the login session (value 0 on login). Values 0 to 800 inclusive, 0 being an empty activity bar and 800 being full. The value decrements by 3 every game tick while in a Soul Wars game. Completing objectives, hitting players / monsters, et cetera increases the activity bar by some value.
When joining the Soul Wars demonstration, this is set to value 800 for the session and does not decrement.