I had a PC do something ingenious. I let it go because it was so cool but I'm pretty sure it wasn't strictly legal.
A Gunslinger threw some packets of gunpowder at a Baddie. A Cleric who had been holding her action immediately took her action to cast Fire Bolt at the baddie, igniting the powder packs to do more damage. I ruled the powder packs do an additional 1d6 per pack on top of the bolt. I did have the Gunslinger roll to hit as if it were a splash weapon but without Throw Anything, I'm pretty sure she should've taken a -4. Not too sure about the gun powder damage either since a whole keg does 5d6.
What say ye?
And obviously I know I can allow players to do cool stuff thats not strictly legal in the spirit of cool but I'm wondering about RAW.
thanks