From Lineage 2 Encyclopaedia

Properties

Hex
Decreases the enemy's P. Def. by 23% for 30 seconds.
Class	Shillien Knight
Type	debuff
Attribute	-
Recast time	2 s
Cast time	1.2 s
Cast range	600
Classes with same skill	Shillien Knight, Bladedancer, Abyss Walker, Phantom Ranger, Shillien Templar, Spectral Dancer, Ghost Hunter, Ghost Sentinel

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
40	1	Decreases the enemy's P. Def. by 23% for 30 seconds.	18	0	28
43	2	Decreases the enemy's P. Def. by 23% for 30 seconds.	19	0	31
46	3	Decreases the enemy's P. Def. by 23% for 30 seconds.	22	0	51
49	4	Decreases the enemy's P. Def. by 23% for 30 seconds.	23	0	68
52	5	Decreases the enemy's P. Def. by 23% for 30 seconds.	24	0	79
55	6	Decreases the enemy's P. Def. by 23% for 30 seconds.	25	0	89
58	7	Decreases the enemy's P. Def. by 23% for 30 seconds.	28	0	154
60	8	Decreases the enemy's P. Def. by 23% for 30 seconds.	28	0	194
62	9	Decreases the enemy's P. Def. by 23% for 30 seconds.	29	0	266
64	10	Decreases the enemy's P. Def. by 23% for 30 seconds.	30	0	295
66	11	Decreases the enemy's P. Def. by 23% for 30 seconds.	32	0	406
68	12	Decreases the enemy's P. Def. by 23% for 30 seconds.	33	0	632
70	13	Decreases the enemy's P. Def. by 23% for 30 seconds.	33	0	940
72	14	Decreases the enemy's P. Def. by 23% for 30 seconds.	34	0	997
74	15	Decreases the enemy's P. Def. by 23% for 30 seconds.	35	0	1428