Everything is destroyed, unless a wish spell is cast to counter this spell within the casting time. The DM loses control of everything and you chose a new DM to start a new world. You must all create new characters. This spell cannot be reversed. 

Can add 666 hours of casting time and 666 GP of glitter to cast as a 10th level spell

If cast as a 10th level spell then in your next campaign you can instead sacrifice 666 spellcasters and become Asmodeus until killed in the 9th hell or gain this spell as a cantrip