Blasting Bundle
Wonderous Item, Rare
Several tubes of bright red treated parchment are bound together and connected to a sizable fuse.
This bomb has a ten inch long fuse, though if you wish you can cut it shorter, and as an object interaction, you can light or extinguish it. Each round the fuse is left to burn, it shortens by one inch, detonating the bomb when it burns down completely. The bundle also detonates if it takes any fire damage.
When the bomb detonates, each creature within a 20-foot radius of the bomb must make a DC 18 Dexterity saving throw. On a failed save, a creature takes 6d6 fire damage and 6d6 thunder damage. On a successful save, the creature takes half damage. Structures and unattended objects receive no save and automatically take double damage.