From Lineage 2 Encyclopaedia

Properties

Final Fortress
Increases P. Def. by 116.875 when HP is below 30%.
Class	Paladin
Type	passive
Attribute	-
Recast time	0 s
Cast time	0 s
Cast range	0
Classes with same skill	Paladin, Dark Avenger, Temple Knight, Shillien Knight, Phoenix Knight, Hell Knight, Evas Templar, Shillien Templar

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
52	1	Increases P. Def. by 116.875 when HP is below 30%.	0	0	79
55	2	Increases P. Def. by 129 when HP is below 30%.	0	0	89
58	3	Increases P. Def. by 141.625 when HP is below 30%.	0	0	154
60	4	Increases P. Def. by 150.375 when HP is below 30%.	0	0	194
62	5	Increases P. Def. by 159.25 when HP is below 30%.	0	0	266
64	6	Increases P. Def. by 168.375 when HP is below 30%.	0	0	295
66	7	Increases P. Def. by 177.625 when HP is below 30%.	0	0	406
68	8	Increases P. Def. by 187 when HP is below 30%.	0	0	632
70	9	Increases P. Def. by 196.5 when HP is below 30%.	0	0	940
72	10	Increases P. Def. by 206.125 when HP is below 30%.	0	0	997
74	11	Increases P. Def. by 215.75 when HP is below 30%.	0	0	1428