B.O.O.M.²

The Blast Object Ordnance Model 2 (or B.O.O.M.²) is magical-technological masterpiece of destruction. Shaped as a small orb with intricate Xhuverian carvings, this item contains unbridled, pure magic energy waiting to be unleashed and wreak havoc. 

As an action, you can twist the upper half of the orb and throw it up to 60 feet away. The B.O.O.M.² explodes where it lands in, covering a 20-feet radius. Each creature in that radius must succeed on a DC 15 Dexterity saving throw. On a failure, a creature takes 8d8 force damage and is knocked prone. On a success, a creature takes half damage and is not knocked prone. 

Notes: Damage, Combat