Casting
The sphere bard may combine spheres and talents to create magical effects. The sphere bard is considered a Mid-Caster. (Note: All casters gain 2 bonus talents and a casting tradition the first time they gain the casting class feature.)
This replaces the spells class feature.
Spell Pool
The sphere bard gains a small reservoir of energy he can call on to create truly wondrous effects, called a spell pool. This pool contains a number of spell points equal to his level + his casting ability modifier (minimum 1). This pool replenishes once per day after roughly 8 hours of rest.
Magic Talents
A sphere bard gains 3/4ths of a magic talent every level (the same progression as he gains caster levels). Whenever the bard would receive a magic talent from his class, he may instead choose a bardic masterpiece he meets the prerequisites for. His caster level for masterpieces is equal to his class level.
U: Part of Ultimate Spheres of Power and does not need to be bought separately from that book