One unique feature of druids in PvP combat is that in their different forms (except normal humanoid form) they are immune to polymorph effects and the act of shapeshifting frees them from any polymorph or movement impairing effect. Another unique feature of druids that is more apparent in PvE combat is that they can resurrect dead group members even in combat, while normal resurrection spells only work out of combat. However, this powerful resurrection spell has a long (10 minutes) cooldown.