Iron Man Contract

Mule Family Contract: "Iron Man Contract" (뮬 가문 계약: "철인 계약", Myool Gabon Gyeyag: Cheol'in Gyeoyag) is a special Contract between Mule Family and the Administrator of the 20th Floor which basically enables stamina regeneration on this specific Floor. Ranker Mule Love can use this contract. Contracts of this kind can be acquired by a Ranker from Special Families through a special test.

About
It is a contract used by Mule Family that allows the user to overcome one's physical limits; in short, it is a contract that restores one's stamina. A Family's Ranker can attain this contract with a Administrator after passing a special test.