So, my goal seems rather simple, and I feel there is probably a method for doing it, but I can't find it at all.
I want to have a vanilla world and a feed the beast (monster) world with the ability for players to teleport between the two. I've thought of multiple ways to do this, having two servers and teleportation between the two, but server to server teleportation seems hard to find and rarely allowing teleportation to a server with a different modpack, or using something like massivecore with creative gates, but I'm not sure of the compatability of massivecore with feed the beast. Another option would be to somehow create a portal to a "vanilla dimension" which should be possible somehow right? Any ideas?