Feat: Arcane Demolitionist

Arcane Demolitionist

Prerequisite: Spellcasting or Pact Magic feature

You gain proficiency with your choice of alchemist's supplies or tinker's tools, if you don't already have it. When you use alchemist's supplies or tinker's tools to craft explosives, the number of explosives that you create is doubled.

The save DC of any explosive that you create is equal to 8 + your proficiency bonus + your Intelligence modifier (minimum 12). In addition, damage dealt by explosives that you create counts as magical for the purposes of overcoming resistance to nonmagical damage.

Once per short rest, with one hour of work using alchemist's supplies or tinker's tools, you can expend a first level spell slot to create a magic explosive. The magic explosive functions as a stick of dynamite, except that it deals a damage type of your choice: poison, acid, fire, cold, lightning, thunder, or radiant. You can expend a higher level spell slot to create a more potent explosive. When you do so, the damage increases by 1d6, and the burst radius increases by 5 feet (to a maximum of 20 feet), for each spell slot level above 1st.