i'm figuring that then you fill it, it goes into auto-heat, and you get your life back VERY QUICKLY. (see the video) it completely bypasses being punished for people heating at the wrong time. very noob and turtle friendly
the main thing is- simply fill the circuit, get life back FOR FREE.
the only way out is simply to score a hit on him, which yes, is also a Get-out-of-combo-free card. Win-Win situation for the Half Moon player at the cost of not having your magic circult strictly for offensive purposes. In Half Moon, you get auto-defense out of it too.