Antimatter Grenade

This grenade uses a specialized case made using 1d4 +1 energy cells to contain the antimatter inside of the grenade.  

As an action, a character can throw a grenade at a point up to 60 feet away. With a grenade launcher, the character can propel the grenade up to 120 feet away.

Each creature within 20 feet of an exploding antimatter grenade must make a Dexterity or Constitution saving throw equal to 8 + thrower's proficiency bonus + thrower’s Dexterity modifier, taking 6d6 Necrotic damage on a failed save, or half as much damage on a successful one. If they fail the save by more than 5 the creature is stunned for 2d4 + 2 rounds.