Water shield : An aquatic American plant (Brasenia peltata) having floating oval leaves, and the covered with a clear jelly.

Example:


Taxonomy
Water Shield, mana, WoWWiki, Shaman, Shield, regeneration, caster, World of Warcraft, passive, orb, Icon, png, spell, buff, Duration, Mana cost, globe, Mana Spring.

Defination from the web:
Water Shield is a Nature-based shaman buff. It improves mana regeneration, and when getting attacked, it restores mana to the caster. ... Improved Water Shield causes an orb to be consumed each time the caster gets a critical effect with Healing Wave, Lesser Healing Wave, or Riptide. ...