I am under the impression that these 2 visits are mere scoutings, getting a lay of the land. Hopefully this is the only one, but from that video of 1000 massivecraft ender dragons.........I rather doubt it. I always said that the spawn world was going to be burned to the ground, but I believed that the threat came from MrsBaver. Looks like the spawn world will burn still, not by the witch-goddess's unholy fire, but by the molten breath of dragons.