mattcolville
Adventurer
I think I'd rule that if you were bound and gagged, you couldn't cast a spell.
Though note that the Silence ritual does not impair spellcasting.
Though note that the Silence ritual does not impair spellcasting.
In my game, the Wizard speaks a word of Supernal that forces the spell to do his bidding.
Since technically there isn't really anything you can do to stop him casting magic
This. If you don't handle it well, it will upset your players and suck all the fun out of your session. My advice to you (which you may, of course, choose to ignore) is to get your player to buy into the idea before you run the adventure, and either start the session with the players already captured, or gloss over the capture briefly, so that they can get to the part where they recover their equipment and escape as quickly as possible.However, you might want to revisit an adventure where a key element of the plot is that PCs are captured and bound - PCs tend to be very resistant to that, and you might be heading for a major railroad if it is a required element of your setup!
This. If you don't handle it well, it will upset your players and suck all the fun out of your session. My advice to you (which you may, of course, choose to ignore) is to get your player to buy into the idea before you run the adventure, and either start the session with the players already captured, or gloss over the capture briefly, so that they can get to the part where they recover their equipment and escape as quickly as possible.