Divine Spirit

Divine Spirit was a priest ability, trainable at level 30. It granted a friendly target a buff that increased spirit for 30 minutes.

Cataclysm
With Cataclysm, Divine Spirit and Prayer of Spirit were removed from the game. As Spirit is the primary mana-regeneration stat, Blizzard doesn't want it to vary as much between solo, small group, and raid play. Blessing of Kings and Mark of the Wild no longer boost Spirit either.

Trivia

 * Divine Spirit is a basic Priest spell in Hearthstone, where it is used to double a minion's health. The flavor text reads: "Double the trouble. Double the fun!"