Experimental Blackrock Grenade

-An experimental grenade found in a Blackrock research facility.

-This grenade explodes in a 20-foot-radius sphere. Each creature in that area must make a DC 15 Dexterity saving throw, taking 17(5d6) fire damage on a failed save or half as much damage on a successful one.

-On a save, the grenade blows up early and deals damage to the thrower.