Rebirth



Rebirth is a druid resurrection ability, the only one of its kind that can be cast while in combat. It is often referred to in game as a combat– or battle–rez, or just "b–rez." Unglyphed, Rebirth requires the use of a Maple Seed, which can be purchased from any reagent vendor. Rebirth can be learned at level 20 for.

Improvements

 * causes Rebirth to resurrect players with 100% health.
 * makes Rebirth no longer require a reagent.

Tips and tactics

 * Rebirth is an emergency ability that should only be used during combat. Use Revive to resurrect allies out of combat.
 * Due to the long cooldown and the limited number of combat resurrections available per encounter, you should save Rebirth for critical players: tanks, healers or the group's highest-performing DPS. Coordinate with your leader, other druids, and the warlocks and shamans in the group to ensure your battle-rez is not wasted.
 * Like Bloodlust/Heroism, groups will often wait until Rebirth is off cooldown before pulling a boss.
 * Since the target is revived at the caster's location with little health, the druid should move to a safe area before casting and healers must be prepared to heal quickly. makes this less of an issue.

Cataclysm
While not mentioned in the post, a shaman's Reincarnation appears to be part of the count.