Joyd |
That's purely a DM call. It's not unreasonable to assume that it might:
- Do nothing
- Light the grenade normally, causing it to explode in 1d3 turns as normal
- Cause it to explode immediately
- Simply destroy the grenade without causing any additional damage, or cause it to explode with a greatly diminished effect
- Do any one of those things randomly.
It's not feasible for the game to specifically define the interactions between every possible pair of obscure game elements, so it's really up to the DM.