L3. Volatile Materials Storage

Short steps lead down into this small cavern, whose air is heavy with the smell of sulfur. Numerous boxes and barrels are filled with blasting powder, black powder, and other dangerously explosive materials.

This cavern is extremely dangerous. Any open flame brought into the area (including that of a torch), as well as any fire or lightning-based effect used in the area, has a 30 percent chance of detonating the materials stored here. This detonation deals 4d10 bludgeoning damage to each creature within the room and in the armory (Area L2). It also partially collapses this cavern and alerts every creature within the lair to the characters’ intrusion.
Any character with a passive Wisdom (Perception) score of 13 or higher, or who succeeds on a DC 13 Wisdom (Perception) check, notices that the materials are stored unsafely and assesses that it’s a miracle none of it has exploded yet.

Treasure

The characters can claim up to twenty pouches of Blasting Powder (see the “Alchemical Items” sidebar) from this area.

Parent Plot

3. Stahlmast’s Lair