Extend Boost
You focus on the intricacies of the magic binding you to your eidolon to extend the duration of your boost eidolon or reinforce eidolon spell. If your next action is to cast Boost Eidolon or Reinforce Eidolon, attempt a skill check with the skill associated with the tradition of magic you gain from your eidolon (such as Nature for a primal eidolon). The DC is usually a standard-difficulty DC of your level, but the GM can assign a different DC based on the circumstances. The effect depends on the result of your check.
Critical Success The spell lasts 4 rounds.
Success The spell lasts 3 rounds.
Failure The spell lasts 1 round, but you don't spend the Focus Point for casting this spell.
Traits
An action with this trait requires a degree of mental concentration and discipline.
Focus spells are a special type of spell attained directly from a branch of study, from a deity, or from another specific source. You can learn focus spells only through special class features or feats, rather than choosing them from a spell list. Furthermore, you cast focus spells using a special pool of Focus Points—you can't prepare a focus spell in a spell slot or use your spell slots to cast focus spells; similarly, you can't spend your Focus Points to cast spells that aren't focus spells.
Spellshape actions tweak the properties of your spells. You must use a spellshape action directly before casting the spell you want to alter. If you use any action (including free actions and reactions) other than casting a spell directly after, you waste the benefits of the spellshape action. The benefit is also lost if your turn ends before you cast the spell. Any additional effects added by a spellshape action are part of the spell's effect, not of the spellshape action itself.
This indicates abilities from the Summoner class.