Ran this and it was a huge hit. I made some fairly big changes starting with Pcs being called from their alternate timelines through the multiverse. From Dark sun to Faerun to Ebberon and Spelljammer. Tied them all together that this was The entire multiverse event and all versions of themselves and everyone they helped in life and the timelines they changed would end. The first encounter with the dragons I went with 2 adults and 2 young. A mix between brass and bronze. That was a disaster. 5 lvl 20 Pcs waltz threw it. Highly suggest starting with 3-4 Adults dragons depending on your table. If they are more experienced you will need to up HP. They walked through every other encounter and roleplayed great to bypass possible enemies I even added. During the whole time weaving our years of table adventures into the story. All culminating in meeting the Solar on spelljammer in wildspace. They ended up bringing the Katori I used for Klauth and gave him Imaskari magic the best I could come up with. This is when I storied together multiple Elder Evils trying to break free. Completely rewrote Tempani and the Horror stat block and amped it up to stupid levels. Added magic weapons and armor. rewrote actions spells and legendary actions. I also added lair actions and changed save rolls to emulate older versions of dnd and brought in fortitude reflex and will saves adding saving throws together and going 30-35 Dc. Used going in and out of the phlogiston to show divine magic waning and letting them know about fire magic used in it. Had 3 3-4hr sessions with this one. Ended with Comets falling past the ship in greyspace crystal spheres which players don't know but carried star spawns and for telling of Atropus coming near. As it ended I had greyspace being covered in a mist on the world of Oerth.

The world where my next adventure will take place another one shot found here... The frostpine horror by 22c gaming by new Pcs rolled up. Then the mist of ravenloft is hitting all of greyspace which will lead after frostpine to Ravenloft and Strahd with new characters at lvl 1. This is fantastic as written would advise to beef up encounters some or completely buff them if u got a table of min/max guys like me. But this gives you so much to build off of its magnificent. Sorry for the long winded and atrocious comment structure my phone sucks and I'm tired. Adventure for me is a 22 out of 10. Beautifully done.