Hachimon Tonkou system
1.The Hachimon Tonkou system unlocks at LV 64
2.The Hachimon Tonkou system has 8 doors and each of them has 10 stars.
3.In order to boost Training of a door, you must progress the door to 10-star status first.
4.The door's stats will increase dramatically when its Training is boosted.
5.Training contains 9 levels.
6.When you failed to boost, the Training level will reduce by 1.
7.You may use the Training Rune while attempting to boost Training to avoid level reduction.