Gareth is not so eager to leap into danger, and stares at the door suspiciously. "Do you even know what that is? Arcane Horrors are pride demons—the most powerful kind of demon—that's taken over a mage corpse." No need to think about how the mage corpse got there, in this place that looks like a dungeon. "They can do magic, and a lot of unpleasant stuff. You won't be winning if you fight alone."

It’s unclear if this is a warning or an offer for help, and Gareth doesn’t look like he’s entirely sure which one it is, either.