The demon lord's voice seems to be coming from the top of the tall pillar that acts as a marker for travelers. Casual observation doesn't reveal anything. A spot check is required. I think I noted the pillar is at least 80 to 100 feet tall. I'll go back and doublecheck a bit later today. There is a -1 to the check for every 10 feet of distance, so it will probably be a minimum of -8 on the roll unless Caerth wild shapes and flies up to get a better look.I see I'm back just in time for my turn in combat.
Before I post (and to be fair, both Aureus and the ogre go first) I'd like to know if the demon lord is visible somehow? Or is that a roll I need to make?