Storm spirit

Storm spirits exist on the Elemental Plane they appear as globes of lightning. If summoned by shamans as Lightning Guardians, the spirits protect them from harm by striking out against anyone foolish enough to attack the shaman protected.

In Warcraft III
This is an alternate name for the "Essence of Storm", the "Storm Panda", one of the aspects of the Storm, Earth and Fire ability of the Pandaren Brewmaster.