lokijam

Im currently playing a level 10 Temple Guardian devout and im unsure how the battle extension works? It seems like it lasts forever until I cast another Combat Art. e.g. I cast the Battle extension, run around and attack with my mace and the arm lasts, then I cast dedicated blow and its gone. So if anyone knows how this Combat Art works, let me know im confused. If that is the case that it disappears when u use another Combat Art it seems kinda pointless, especially when im spamming dedicated blow.