Successfully complete the game once. When playing it again, you will be 300,000 Dinales in debt. At the Tower Of Despair, there is Top Hunter mode. You must be at least level 45 to have a chance. If you complete it, you will get a Cyframe called Hunter Booster (only the first time, and anyone can use it with a cyframe) and 20,000 Dinales (every time you complete Top Hunter mode after the first time). You will soon be able to pay off your 300,000 Dinale debt. The receptionist will congratulate you on the debt and give you the Comet Booster, which only Mag can use. It is the ultimate booster. You will also level up to a maximum of three levels in Top Hunter mode, however the higher in level, the more experience is needed to level up. Having Mag, Pepper, and Carcano is recommended.