Pyroconverger

As an action, you can cause the pyroconverger to project fire in a 10-foot cone.
Each creature in that area must make a DC 13 Dexterity saving throw, taking 4d6
fire damage on a failed save, or half as much
damage on a successful one.
Malfunction: Pyroconverger can malfunction,
after use roll d10 + # of uses since last long rest.
If total is 11 or higher, you take 4d6 fire damage.
Resets after long rest.