Rockheart's Volcano Mace

Damage: 1d6 (1d8)
Damage Type: Bludgeoning
Properties: Simple, Versatile, 3 Charges
The weapon regains 1D3 charges per Dawn.
Grants the user Darkvision of 60ft. If they
already had this it will increase it to 90ft.
On a successful hit, you may expend X charges:
[1] Add an additional 2d6 Fire Damage
[3] Opponent makes a DC20 Constitution
saving throw or be stunned for 1 turn.