From Lineage 2 Encyclopaedia

Properties

Robe Mastery
Increases P. Def. by 7.2 when equipped with a robe.
Class	Shillien Oracle
Type	passive
Attribute	-
Recast time	0 s
Cast time	0 s
Cast range	0
Classes with same skill	Cleric, Bishop, Prophet, Elven Oracle, Elven Elder, Shillien Oracle, Shillien Elder, Cardinal, Hierophant, Evas Saint, Shillien Saint

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
20	1	Increases P. Def. by 7.2 when equipped with a robe.	0	0	4
20	2	Increases P. Def. by 8.6 when equipped with a robe.	0	0	4
25	3	Increases P. Def. by 11 when equipped with a robe.	0	0	6
25	4	Increases P. Def. by 12.7 when equipped with a robe.	0	0	6
30	5	Increases P. Def. by 15.4 when equipped with a robe.	0	0	9
30	6	Increases P. Def. by 17.4 when equipped with a robe.	0	0	9
35	7	Increases P. Def. by 20.5 when equipped with a robe.	0	0	11
35	8	Increases P. Def. by 22.7 when equipped with a robe.	0	0	11