Obsidian Sword

On a hit, deals an extra 2 fire damage
Whenever you hit with this weapon, you immediately after can cause the sword to shatter
on impact, causing the blade to explode into a
million shards of obsidian. The target, as well as everyone within a 15 foot cone emanating from
you must make a DC 15 Dexterity Saving Throw
or take 4d6 magical slashing damage. You can
choose to shatter the blade after you roll damage
for the initial attack. Once you shatter the blade,
it must be reformed by taking a