As two actions, this 30-centimeter-long wooden tube begins to shake and emit a handful of white sparks, shedding light as a torch. It flies up to 20 meters where it explodes with a dazzling display of colors. Each creature in a sphere must make a Fortitude saving throw.
On a successful save, a creature takes half as much damage.
You can increase the damage by 1d10 for each additional catalyst expended.