Primal Evolution Feat 4
Source Pathfinder Core Rulebook
Prerequisites bloodline that grants primal spells
You can call upon the creatures of the wild for aid. You gain an additional spell slot of your highest level, which you can use only to cast Summon Animal or Summon Plant or Fungus. You can cast either of these spells using that spell slot, even if it they aren't in your spell repertoire.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
PrimalThis magic comes from the primal tradition, connecting to the natural world and instinct. Anything with this trait is magical.
SorcererThis indicates abilities from the sorcerer class.