Bug or by design?

A Burnt Hallway [Exits: north east south west] (Invis) (Translucent) A great cloud of flames smoking with dark images of twisted faces erupts with cries of torment revealing a horned demonic figure. You yell 'Help! I'm being attacked by Graazur'Ukal!' Graazur'Ukal fades into existence. Graazur'Ukal DISMEMBERS you! Graazur'Ukal DISMEMBERS you! Graazur'Ukal sends you sprawling with a powerful bash! Graazur'Ukal's bash hits you. Graazur'Ukal is in perfect health. <745hp 398m 440mv 24029tnl> fle Graazur'Ukal leaves north. Graazur'Ukal is in perfect health. I'm not complaining mind you, but he walked right out of combat.