Divine Storm

Divine Storm is a tier 3 paladin talent in the Retribution tree. It unlocks a spell of the same name.

Use
The ability is somewhat similar to a warrior's whirlwind ability, but with the added healing effect. This ability manifests as gold colored hammers and streams of light swirling around the paladin. This ability can proc seal effects. Although this does not affect the ppm of seals, when used on multiple enemies it can proc the effects of Seal of Insight several times, resulting in a large mana or health gain. It can also proc damage dealing seals such as Seal of Righteousness.

Divine Storm is meant to be used when fighting multiple targets at once, such as trash packs. It is especially effective for that purpose when coupled with the cleave effect of Seal of Righteousness, enabled via the Seals of Command talent.

Healing from Divine Storm
Apparently, healing from Divine Storm goes first to person with the lowest HP. If that person will be topped, the rest of the healing will go to the second person. If that person will be topped, the rest will go to the third person. In other words, in a normal raid situation, it will almost never overheal.

History
Originally, Divine Storm was a 51 point talent in the retribution tree, introduced in the Wrath of the Lich King expansion pack. The original skill dealt holy damage, but shortly after patch 3.0.2 went live, the PvP community called for Retribution Paladin's burst to be toned down, as a result, this spell was changed to deal physical damage, along with other changes, such as the removal of all critical strike damage increasing talents from the talent tree.

Prior to Patch 4.0.1, Divine Storm was an important part of the retribution rotation against any targets, especially with the two-piece Lightsworn Battlegear bonus, which had a chance to reset its cooldown. Its importance was diminished for single-target fights with the introduction of Templar's Verdict, but it was still effective in clearing packs of mobs. In Patch 4.0.3a it was redesigned to no longer use Holy Power but to use mana again.