I'm curious what people think about this scenario. If the 5 (or 4 rather) nations joined forces across Khorvaire along with the Dragonmarked Houses and created an armada of spelljamming ships to invade the Forgotten Realms what do you think would happen? Is Elminster powerful enough to crush such an invasion single-handedly? There are a lot of other powerful characters in the realms. Would they be able to collectively repel such a force? Would they fracture under their own infighting?