Spellcaster Support
(Oriental Adventures, page 66, DnD 3.0)
[Ancestor]
Your ancestor, Shiba Kaigen, was a samurai who used his knowledge of spellcraft to help defend a mountain pass from a Lion invasion.
*Clan:* Phoenix.
Benefit
You can use the Aid Another action, making a "Spellcraft":skills/spellcraft/ check against a DC of 10, to add +2 to the Difficulty Class of an allied shugenja's spell.