I was looking at the jedi knight sentinel and looked under the combat tree, wanting to just compare the other tree's within the sentinel AC. But when I came to the first tier of the combat tree, I was stuck on one certain talent. Defensive Forms: Builds one Centering when attacked. When they say this, im not sure if they mean when like attacked physically like a tank would, some aoe that a boss or npc or player would cast, or just for being in combat in general. Can anyone help me on this and confrim which it is? Thanks!