Auto-Rotation
Casts the best spell for your specialization right now. While this is on your action bar it also highlights the recommended spell, so you can cast it yourself instead. Doing that costs nothing — only casts made by pressing this button carry the 25% longer global cooldown.
Archer
Artificer
Bard
Druid
Mage
Necromancer
Paladin
Priest
Reaper
Rogue
Shaman
Warrior