From Lineage 2 Encyclopaedia

Properties

Fighter's Will
When using a short-range weapon, increases P. Atk. by 100 and Atk. Spd. by 10%. When attacking, has a chance to increases physical skills' Power and Critical Rate.
Class	Sword Muse
Type	passive
Attribute	-
Recast time	0 s
Cast time	0 s
Cast range	0
Item for learning skill	Forgotten Scroll: Fighter's Will
Classes with same skill	Duelist, Dreadnought, Phoenix Knight, Hell Knight, Sagittarius, Adventurer, Evas Templar, Sword Muse, Wind Rider, Moonlight Sentinel, Shillien Templar, Spectral Dancer, Ghost Hunter, Ghost Sentinel, Titan, Grand Khavatari, Fortune Seeker, Maestro, Doombringer, Soul Hound, Soul Hound-, Trickster, Judicator

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
81	1	When using a short-range weapon, increases P. Atk. by 100 and Atk. Spd. by 10%. When attacking, has a chance to increases physical skills' Power and Critical Rate.	0	0	6500