Chaos Weapon

4-level Transmutation

Casting Time: 1 action

Range/Area: Touch

Components: V, S, M

Materials: 5 gp worth of blackpowder or alchemist’s fire, which the spell expends

Duration: Concentration, up to 1 hour

You imbue a weapon you touch with volatile magic. If the weapon isn’t already a magic weapon, it becomes one for the duration. Until the spell ends, the weapon emits bright light in a 5-foot radius and dim light for an additional 5 feet. In addition, weapon attacks made with it score a critical hit on a roll 19 or 20 on the d20, and the first time each turn a creature scores a critical hit using the weapon, an explosion of arcane energy bursts from the point of impact. Each creature other than the weapon’s wielder within 10 feet of the target must make a Dexterity saving throw. A creature takes 2d8 damage on a failed save, or half as much on a successful one. The weapon’s wielder chooses one of the d8s. The number rolled on that die determines the explosion’s damage type as shown below. If the same number is rolled on two or more of the d8s, the explosion’s radius increases to 20 feet.

Number	Damage Type
1	Acid
2	Cold
3	Fire
4	Force
5	Lightning
6	Poison
7	Psychic
8	Thunder

At higher levels: When you cast this spell using a spell slot of 6th or 7th level, weapon attacks made using the weapon score a critical hit on a roll of 18-20 on the d20, and the explosion’s damage increases to 3d8. When you use a spell slot of 8th or 9th level, weapon attacks made using the weapon score a critical hit on a roll of 17-20 on the d20, and the explosion’s damage increases to 4d8.