Phosphorescent Gel

Once vial seal broken, liquid reacts with
surrounding air & begins to rapidly heat up,
glowing like candle for 1 hour. After hour, oxidization of chemical is complete, & gel dissolves
in white-hot flash, dealing 3d6 points fire damage
to everything. Single dose of gel can coat 6 square inches of surface. Multiple doses of gel can be
used to coat larger surfaces, but damage does not
stack. Gel can be used to ignite larger explosive
such as fuse grenade or pot of oil.