Rebirth will resurrect the Hierophant automatically after their death (except for falling deaths). The automatic resurrection can be cancelled after death by cancelling the flashing Regenesis icon that appears after dying.
When target dies this spell will cast Regenesis on target. Lasts for 5.0 seconds.
Upon your death (and hence resurrection), your hate and aggro toward any mobs will be totally wiped clean. Although Rebirth does lead to some "double deaths", it can be a great skill for saving a group from a wipe or saving you the time of traveling back from the respawn point.