Symbiosis with nymphs.

Well, firstly, what's the point of a manual then? Everything is clearly and understandably written there: This creature can heal and resurrect Ents once per battle and receive the same healing from them (an activated ability). A group of Ents receives 4 health points for each Nymph, and a group of Nymphs receives 20 health points for each Ent. Just in case: any Ents can be used for resurrection.