Eternal Guardian

Eternal Guardian is a pet ability available exclusively to the quilen family of hunter pets.

History
Prior to Battle for Azeroth, it could revive a fallen party member with 60% health and 20% mana, even in combat.

It was functionally identical to the moth family's Dust of Life and the crane family's Gift of Chi-Ji. Note, however, that none of these abilities were usable in Arena matches.