I found a bug in Dota, with obsidian destroyer. This can be a serious abuse. If u make a tread with him n just have essence aura...click to tread to change form.. I mean from intl to str, or str to agi..keep clicking on it. Suddenly u will see that due to essence aura u r getting yr mana back. Isnt this useful with only a tread, yr mana never ends. Cheek it now.