I think the GM did mess up a bit.
The encounter is in a limited resource zone (desert, need water in a hurry to put out a fire).
People come up with non-standard solution ideas WHEN resources are limited.
Therefore he needed to be mentally prepared to consider and accept ideas that have a hint of plausibility.
All he had to do was say "yeah, it might help, but since it isn't directed, it may be unpredicatable
So let the PC cast the spell, and roll a 50/50 chance to see if it worked or not. Or do a % roll and that's how much of the fire in that square it puts out.
A simple resolution that rewards clever thinking.
It's not like the spell was written specifically to rob another class of its function. Nor may the spell work that well for every fire (a desert is full of dust and sand, so it seems reasonable to allow that kicking a ton of it up may work fine here, but not back in normal-land)
The encounter is in a limited resource zone (desert, need water in a hurry to put out a fire).
People come up with non-standard solution ideas WHEN resources are limited.
Therefore he needed to be mentally prepared to consider and accept ideas that have a hint of plausibility.
All he had to do was say "yeah, it might help, but since it isn't directed, it may be unpredicatable
So let the PC cast the spell, and roll a 50/50 chance to see if it worked or not. Or do a % roll and that's how much of the fire in that square it puts out.
A simple resolution that rewards clever thinking.
It's not like the spell was written specifically to rob another class of its function. Nor may the spell work that well for every fire (a desert is full of dust and sand, so it seems reasonable to allow that kicking a ton of it up may work fine here, but not back in normal-land)