Mugen train should be a event and a form of travel where people can buy a ticket and it would have a chance to spawn demon/slayer npc's that attack the train
(I think mugen train should have atleast a 5 player requirment to spawn npcs depending on faction)
and maybe should take like 5 minutes to make a full trip around the map (depending how big the map is but if the map is large make it maybe 10 minutes and 100% chance of the opposite faction attack train)

