Skill Objects modify a character's effective skill rating if the skill is known and the object is worn/equipped.

Level Object Bonus Location
91 essence of dao 30% Polearm Utu'ln Tower (dao)
91 Belt of the Ages 20% critical hit, 2 strength Ashlish (chests)
91 Plaited Ring 30% True Healing Castle Tramontane (dungeon?)
91 a fire opal ring 18% sword Ashlish (chests)
91 Courage 15% lacerate, 3 svmd, 10 will Ashlish (chests)