3.PF Ability to share life pools between PCs?

[Sheogoroth]

I remember seeing a spell or ability that allowed you to share damage between characters. Does anyone know what that is?
My DM is having us do a "Last Stand" one-shot(he likes to incentivize us to make OP builds sometimes) and I thought this would be neat if it exists.
I have access to 3.0-PF1e with SoP/SoM.

[sreservoir]

Share Pain (http://www.d20srd.org/srd/psionic/powers/sharePain.htm), perhaps?

[Elkad]

PF Life Link transfers damage to the oracle/shaman at the beginning of his turn (5hp per player at a time).

Life Pact (spell) drains hitpoints from other members of the spell to keep someone out of the negatives.

Both are small amounts, but they do work to link the party.

[MinimanMidget]

Shield Other splits damage taken between 2 characters.

[Doctor Despair]

Blessings of the Godless kinda does this

[thethird]

I remember seeing a spell or ability that allowed you to share damage between characters. Does anyone know what that is?
My DM is having us do a "Last Stand" one-shot(he likes to incentivize us to make OP builds sometimes) and I thought this would be neat if it exists.
I have access to 3.0-PF1e with SoP/SoM.

Well what level are you?

Union of Blood (http://spheresofpower.wikidot.com/blood#toc58) will doo what you need and then some.

Dreamscarred press material (and expansions to it) have also interesting alternatives. Zealot (https://libraryofmetzofitz.fandom.com/wiki/Zealot) allows you redirect damage, Vitalist (https://libraryofmetzofitz.fandom.com/wiki/Vitalist) allows you to redirect healing.