|Play this card on 1 monster group during your turn and keep it in your play area.
Discard this card when a monster in this group suffers equal to its Health. That monster immediately recovers 5 .
Note: Rune Of The Phoenix only saves a monster when that monster suffers hearts equal to it's health, it does not trigger if some card or effect instantly destroys the monster (such as Blood Rage).
It is also noteworthy that since the monster immediately recovers 5 hearts, it is never destroyed and therefore does not trigger any effects that depend on the monster being destroyed.