Things become really simple when you can manipulate all sides of a conflict precisely to your liking... "Help" each of them to a partial success, one better than they ever had, then throw in a another major power player who's able to obliterate them all and mask him as acting as a mere diplomat provided that violence is avoided - brilliant. And not too difficult to do having some knowledge of the place and the money to apply bribe and support at the right places. And the will to sacrifice millions of natives in the process.
There was also a little bit of bad luck in play for Brooder - had he learned that president Musa had been killed off immediately after the bomb exploded, he might have had the chance to send Fusion back in as the well-known guardian angel who would have had a reputation advantage over Major Power. Things would have needed some serious fiddling but Brooder's side might well have gotten the upper hand in all this, with the disadvantage that he still had a secret fight against Lord at hands, but he could have kept Major Power from gaining the strong foothold he has now.
Only (I guess) Brooder learned about the goings-on a bit too late, was still entangled in legal issues and by the time he could have done something, it was possibly too late - and Fusion was not available.
Now all they can do is publicise that there is a Drainomyte mine in Dramaria er Darmar and remind the public that Drainomyte has one special purpose (even if there are other, too) and tht Major Power is not susceptible to Drainomyte. And remind the public that Lord owns the mine and that Lord is the one who "accidentally" created Major Power.
But since this is a very obvious move, one can bet that that Lord has prepared an answer to it, so it's probably better for Brooder's side to not do it.
All true. And all proof that a foe with long-term plans and the patience to let them play out (as well as the ability to think quick and improvise, as Fusion forced Lord to do) can be worse than someone with nothing more than brawn.