Boss
Hydra's Treasure
Drops
Chance per kill at an even level, before drop bonuses
25%
25%
25%
25%
25%
25%
25%
25%
25%
25%
25%
25%
18.75%
15%
15%
15%
15%
15%
15%
12.5%
12.5%
6.25%
2.5%
2.5%
1.25%
1.25%
1.25%
0.25%
0.25%
0.25%
0.25%
0.23%
0.23%
0.23%
0.23%
0.2%
0.2%
0.2%
0.15%
0.15%
0.15%
0.15%
0.13%
0.13%
0.13%
0.13%
0.13%
0.13%
0.13%
0.1%
0.1%
0.05%
0.05%
0.05%
Fighting monsters far above or below your level lowers the drop chance; bosses are more forgiving. Drop events, gloves and premium raise it.
Where to find it
Appears inside a dungeon or during an event, not on an open map.