I have an encounter in my game tonight that has an Allip... they have an aura of 60ft for their Babble ability: "All sane creatures within 60 feet of the allip must succeed at a DC 15 Will save or be fascinated for 2d4 rounds."
The room that this allip is in is fairly small considering this aura--in fact, the aura of 60ft would cover most of the dungeon. My question is: Does this aura penetrate through walls? Detect evil cannot detect through "1 foot of stone, 1 inch of common metal, a thin sheet of lead, or 3 feet of wood or dirt", so would an aura of Babble pass through similar walls?
I feel like it wouldn't, but also wanted to clear up my confusion. Thanks for any help!!