Meld into Eidolon
Feat 1
Source Pathfinder Impossible Magic
Your physical form can combine with that of your eidolon.
You Manifest your Eidolon, but instead of summoning them into an adjacent open space, you become them. You can also Meld into Eidolon while your eidolon is manifested in an adjacent space. While Manifested in this way, you use your eidolon's statistics, and you can't act except to direct the eidolon to use Manifest an Eidolon to unmanifest themself. Your eidolon is affected by Boost Eidolon while Manifested in this way.
Since you can't act, you can't cast spells, activate or benefit from magic items that normally benefit you and not your eidolon, perform actions that have the tandem trait, or use other abilities that require you, and not the eidolon, to act.
You can't be separately targeted while you are melded into the eidolon. When you reach 0 HP, your eidolon unmanifests, leaving your body behind, Unconscious and dying.
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.
SummonerThis indicates abilities from the Summoner class.