Spirit's Sacrifice [free-action] Feat 18Animist Apparition Source War of Immortals pg. 26Trigger You would die.
Your attuned apparition gathers all of the energy it can through your shared bond and uses that power to disperse itself while channeling the energy back into you, saving your life. You can use Spirit’s Sacrifice even while
unconscious or otherwise unable to act. Choose one apparition you have attuned; you do not die, your
wounded condition is reduced to 1 if it would be higher, and you regain a number of Hit Points equal to twice your level. The chosen apparition is dispersed until you can re-attune to it at your next daily preparations.
Traits
Apparition: Apparitions are spiritual entities who generally lack the power, cohesiveness, or attachments to enter or affect the physical world. Unlike a ghost or phantom, an apparition does not need to have ever been a living creature and could be the spiritual memory of a particularly meaningful location or event. Apparitions are reliant on animists to interact with other people and things, and generally can't be targeted or affected by spells and abilities other than those of the animist they are attuned to. Animist feats and abilities that affect spirits affect apparitions only if they specifically say so.
Animist abilities with the apparition trait involve one or more of your apparitions acting alongside you. You must be attuned to at least one apparition to use an apparition ability, and some abilities might state in their requirements more specifically which apparition you must be attuned to. Typically, you're assumed to always attune to your apparitions during your daily preparations, but in some rare circumstances or as a result of certain animist abilities, your apparitions might be dispersed or separated from you for a time; you aren't attuned to dispersed apparitions.