One of three items used with the PUP "Repair" ability. Really nice to have if your automaton is either tanking, or using the Mana Converter. Even though if you have the Damage Guage you could just make your Automaton Cure itself. However, if you dont want to waste the MP on a Cure this is a really nice alternative. It's really quick, and the 20HP/tick is a big jump! I highly recommend using these over the NQ ones as soon as you ding 30.
