Shadowmeld (WoW)  

Shadowmeld is the Night Elf racial ability that allows them to enter a stealth mode while standing still. Movement or damage will cause this Shadowmeld to deactivate. This ability also passively boosts the rogue and druid stealth ability and is thought by many to be equal to rank one of Master of Deception. While a Rogue's stealth is superior to Shadowmeld, the skills operate on different cooldowns. A rogue can use Shadowmeld while their stealth ability is on cooldown to temporarily evade detection. As a bonus, one can log out while in Shadowmeld.

Shadowmeld can be used both in Moonkin and Tree of Life forms, giving night elves a slight advantage in defensive roles for PvP compared to Tauren druids.