Comrade's Succor

You forge a mystic bond, intertwining the fates of three allies, one of which can be yourself. While the spell lasts, any hit point recovery received by any of the spell’s targets that is in excess of their hit point maximum is redirected at the spell target within 50 feet of them who currently has the fewest percentage of hit points remaining. If this spell is cast on a creature that is already subject to this spell, the original spell ends.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each spell level above 1st.

Adapted from the D&D 4th edition ritual of the same name.