Development and updates on this website have come to an end. There won't be any more update in the foreseeable future.
More details here 
Seleucid
Black Frost Sword
A pair of pitch black swords Istvan bought for Seleucid after he joined Istvan Gang. These two lightweight swords are said to be ancient relics, and are perpetually covered with frost. After receiving them, Seleucid soon mastered the art of dual blade swordsmanship.
Crushing Force
Passive
There is a 70% chance of increasing Chain Combo damage by 50%.
Level details
Level 1
Total bonus stats:
ATK: 25DEF: 10HP: 50Counter Bonus: 3%
100
Level 2
Total bonus stats:
ATK: 50DEF: 20HP: 100Counter Bonus: 7%
4
300
10000
Level 3
Total bonus stats:
ATK: 50DEF: 20HP: 100Counter Bonus: 7%
8
600
20000
Level 4
Total bonus stats:
ATK: 75DEF: 30HP: 200Counter Bonus: 11%
4
400
20000
Level 5
Total bonus stats:
ATK: 100DEF: 40HP: 300Counter Bonus: 15%
4
400
30000
Level 6
Total bonus stats:
ATK: 100DEF: 40HP: 300Counter Bonus: 15%
8
800
50000
Level 7
Total bonus stats:
ATK: 140DEF: 50HP: 400Counter Bonus: 20%
4
500
50000
Level 8
Total bonus stats:
ATK: 180DEF: 60HP: 500Counter Bonus: 25%
4
500
60000
Level 9
Total bonus stats:
ATK: 220DEF: 70HP: 600Counter Bonus: 30%
4
500
80000
Level 10
Total bonus stats:
ATK: 220DEF: 70HP: 600Counter Bonus: 30%
8
1200
150000