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 
Dark Casket
A huge broken sword that looks like a dark coffin. It has a Star Crest and is pointy and sharp. It is made out of a mysterious special alloy that is indestructible. At the same time, it has a built-in device that amplifies water magic and negates enemy attacks, as well as redirects kinetic energy to provide great protection for the person wielding it.
Vigilance
Passive
Gains 10 Vis at the beginning of the battle. When ending the round in a non-augmented state, gains 5 Vis (gains 1 extra Vis for every 20% of HP lost).
Level details
Level 1
Total bonus stats:
ATK: 25DEF: 5HP: 50Counter Bonus: 3%
100
Level 2
Total bonus stats:
ATK: 50DEF: 10HP: 100Counter Bonus: 6%
5
400
10000
Level 3
Total bonus stats:
ATK: 75DEF: 15HP: 150Counter Bonus: 9%
10
800
20000
Level 4
Total bonus stats:
ATK: 100DEF: 20HP: 210Counter Bonus: 12%
5
500
30000
Level 5
Total bonus stats:
ATK: 130DEF: 30HP: 270Counter Bonus: 15%
5
500
30000
Level 6
Total bonus stats:
ATK: 160DEF: 40HP: 350Counter Bonus: 18%
10
1000
50000
Level 7
Total bonus stats:
ATK: 190DEF: 50HP: 430Counter Bonus: 21%
5
600
60000
Level 8
Total bonus stats:
ATK: 220DEF: 60HP: 530Counter Bonus: 24%
5
600
80000
Level 9
Total bonus stats:
ATK: 260DEF: 75HP: 630Counter Bonus: 27%
5
600
100000
Level 10
Total bonus stats:
ATK: 300DEF: 90HP: 780Counter Bonus: 30%
10
1500
200000