Spark stone

The Spark Stone was a magical item that, when crushed, granted its user a boon of +1d6 fire damage with hands, claws, or talons when activated. Before being crushed, the Spark Stone was a orb of blackened rock that had red veins of pulsing energy arcing through it like a bolt of lightning locked in a single moment in time. Keyleth crushed the stone during Vox Machina's fight against a Behir near Whitestone