Source: Diamond Classes: Avatar Companion and Void Archetypes
This archetype requires sphere summoner.
Proficiencies
Champion summoners are proficient with simple weapons, as well as light armor and bucklers. In addition, if this is this character’s first level in any class, they may select a martial tradition of their choice.
This alters proficiencies.
Blended Training
A champion summoner gains a combat or magic talent every time they gain a caster level. Champion summoners use their casting ability modifier as their practitioner modifier.
This replaces the magic talents class feature granted by sphere summoner.