Scourger

These silvered gauntlets have 6 charges.
On hit you can expend 1 charge as part of attack
action to deal extra 1d4 fire damage.
If you have all 6 charges remaining you can
instead expend them all to deal extra 9d4 fire
damage, but you take half of damage.
You can regain all charges by spending an action
to refill the gauntlets with alchemist fire (which
is used in the process).