Using a Bakuda bomb to open a portal into a parallel dimension (usually around Arc 4) is actually a trope I’ve seen in Worm crossover fanfiction. So you’re not the first here ;D
Hah, nice! 😀
Honestly, one of the main reasons I did it that way was so I could get on the Protectorate’s case about using them again, just for fun. 😛
Seriously, though, I can’t believe I wrote a story where unforeseen consequences happen because the Protectorate used Bakuda’s bombs while butting in on a fight between the Undertravelers and the Nine right before Piggot’s plan to do pretty much that exact thing was revealed.