Skillchain Bonus is a job trait in Final Fantasy XI. It increases the bonus damage on a Skillchain by 8%, 12%, 16%, or 20%, depending on the ability's level. Skillchain Bonus I is available to Dancers (level 45), Samurai (level 78), Monk (level 85), and Ninja (level 85). Blue Mages can obtain the ability by equipping the spells Goblin Rush and Benthic Typhoon, which can be done as early as level 83. Skillchain Bonus II, III, and IV are available only to Dancers, at levels 58, 71, and 84, respectively.