There are a couple of logical steps we can take against LA Agartha.
Can anyone else overwrite the forge? I've got a decent pile of earth gems, but not enough to take it myself (and of course I don't have Con 7) - I'd be happy to promote a 3rd tier player by giving *him* the forge, especially if he's willing to pay people back the earth gems used to take it.
Failing that, I don't have many pearls, but I've got some, and a concerted effort can dispel the forge. Allow the possibility that he was clever enough to cast it at minimum cost, expecting exactly this (also allowing the possibility that he through everything he had into it...)
Finally, of course, everyone should hit LA Agartha. There's a war in the water that needs to stop
, and then LA Agartha presumably has land neighbors. Putting up the forge is a balzy statement that you think you can take all comers. I congratulate him on his courage.