Originally Posted by Jester
You start with 100% Stamina. Each dungeon you do takes around 5% of it. : p
Or 4%. .-.
But yeah, it limits you from grinding like crazy in dungeons, but you can still PvP and Arcade afterwards. I just have mules to play when my Elsword and Eve runs out of stamina. (which is never, haha)
EDIT: Stamina is reset (together with your bonus lives) every 24 hours, last time it reset was 1 hour and 53 minutes ago.