its reference your Ego bar, Ego bar its like HP. You will increase your ego points.
My notice from this game
So much bugged. I won one guy he had 2 time more Ego,Harcore, Endurance than me, and i only got 8xp points lol.
items can't renew after expired time to buy, if you don't buy any. There items that you don't need to buy, so what to buy only to clean up space for the next ones? And one more thing After lv up why not recharge battle power points?