In addition, when your Power Word: Shield is completely absorbed or dispelled you are instantly energized with mana equal to 200% of your Spirit. This effect can only occur once every 12 sec.
Rapture is a passive priest ability learned at level 10 for those with the Discipline specialization. While removing the cooldown of [Power Word: Shield], it also helps to energize the priest with mana when the shield is dispelled or completely absorbed.
Patch 4.0.6 (8-Feb-2011): Rapture’s tooltip now has the correct percentages listed.
Patch 3.0.8 (2009-01-20): This talent will now correctly return mana for Power Word: Shield based on the caster's mana poll instead of the target's mana pool.