Ashen Muster Bell
The Ashen Muster Bell is an infernal alarm disguised as battlefield wreckage. When disturbed, it tolls without moving, and the sound rolls across Avernus like iron dragged over teeth. Every creature nearby feels the vibration in its bones before the bell’s red glow spills across the ash.
Ashen Muster Bell
Defenses
Detection
“A bronze war bell hangs from a scorched iron frame, its surface blistered by heat and etched with tiny infernal contracts. No rope is attached. Instead, a hair-thin red filament runs from the bell across the road, nearly invisible beneath drifting ash.”
Standard Engagement
A creature crosses or touches the nearly invisible red filament, or damages the bell without first disabling it.
When triggered, the bell tolls once and releases a wave of infernal sound. The hazard has no further action unless its Muster Brand remains active.
The bell resets after 10 minutes if the filament is undamaged and the bell has not been permanently disabled.
When the filament is crossed or touched, the bell tolls. Each creature within 30 feet that can hear it must make a DC 14 Constitution saving throw. On a failed save, a creature takes 10 (3d6) thunder damage and is deafened until the end of its next turn. On a successful save, it takes half damage and is not deafened.
The bell’s toll brands one creature that fails the saving throw, chosen by the hazard’s creator or randomly. Until the end of that creature’s next turn, fiends have advantage on attack rolls against it, and the creature sheds dim red light in a 10-foot radius.
The toll can be heard clearly for 300 feet across open terrain. At the DM’s discretion, nearby devils or creatures bound to infernal service recognize the sound and investigate.
If the bell is triggered three times within 1 hour, an infernal patrol arrives in 2d6 minutes. The patrol might be a pair of bearded devils, a devil-mounted scout, or another force suitable for the campaign.
Turn Ashen Muster Bell into a sheet
A high-res, share-ready sheet you can post or print.