The Eggcellent Adventure content has been turned off.
The Arch Fiend's Special Ability has been implemented - it removes a non-dragon creature from the dungeon for the remainder of the fight. Don't worry, the creature returns after the battle. Other Arch-Fiends are immune and the affect will only apply to creatures that are a level up to twice that of the Arch Fiend.
The Death Knight's Special Ability has been implemented - each enemy killed grants the Death Knight +10% Attack Power and +10% Damage for duration of the battle. Ability buffs stack on each kill.