The Immortality Contract

"As a reward for passing his test, the 100th Floor Administrator gifts "Eternal Life" to Zahard and the 10 Great Family Heads. However, among them, only one was exempt, and he is Hendo Lok Bloodmadder, the Family Head of the Hendo Lok Family. (The exact reason is unknown)"

- Author SIU

The Immortality Contract refers to the Contracts between 100th Floor Administrator and the original 13 Irregulars (King Zahard and Great Warriors).

Zahard
The King of the Tower, the first man ever to make a contract with the Administrators of the Tower, and the man who built his own kingdom within the Tower.

Zahard made a contract to become the King of the Tower with immortal body. The contract ensures that no resident of the Tower (people who were born inside the tower, the regulars) can kill Zahard.

Hendo Lok Bloodmadder
Bloodmadder pleaded to the Administrator to teach him how he can live eternally, and the Administrator gave him one condition. "''If you curse all of your children and their children with short lives, You alone will be able to live eternally by receiving their lives.""

- 100th Floor Administrator to Hendo Lok Bloodmadder

Bloodmadder was agonized, but he could not defeat his fear of death.

Eventually, Bloodmadder pleaded the Administrator to grant him eternal life, and afterwards all those who carried Bloodmadder's blood came to have short lives. (Of course, in the Tower a short life is about 100 years. In a Ranker's case, it is a bit longer. However, Hendo's children can never live forever.)

Afterwards, Bloodmadder had to have many children in order to extend his lifespan, and so Bloodmadder is the one with the most children out of the 10 Great Families. Because the Administrator promised him that his life will be extended by the length of the sacrificed lives of his children, although no one knows the exact details of the contract, it seems definite that he needs to maintain as many children as long as his lifespan is.

Yeon Hana
According to a rumor, she could not forget a man whom she broke up with a long time ago, and so she made a contract with the Administrator to become a "Female that cannot feel love towards the opposite sex."

Quotes

 * (Rachel to Ja Wangnan) "If you get the complete Thorn, you might find out how to beat Zahard and his immortality."


 * (Evan Edrok to Ha Yuri Zahard about Karaka being immortal) "That can't be. Only Zahard and the 10 Great Family Leaders who made a deal for immortality with the Administrator."


 * (Twenty-Fifth Baam to Garam Zahard about Zahard) "He entered the Tower as an Irregular, climbed the Tower with Ten Great Family Leaders and made a deal with the Administrator to become King of the Tower. An immortal body. A commander of powerful Shinsu. An enemy of FUG."