Here is another installment of exTRAPaganza, our Thursday over-the-top trap series.
The entire dungeon is coated in a fine layer of dust. This dust acts as a contact explosive. Any concussive impact, such as a weapon blow, or striking an object that requires a Strength check causes a small explosion. All targets within 5′ of the impact must make an average Dexterity saving throw or take low fire damage.