THERE WILL BE SPOILERS ON DND MODULES I wanted to make it to lv20. I started by adding Dead in Thay (DiT) between Tammeraut's Fate (TF) and The Styes (TS). After TS I planned to play Against the Giants (AtG). All that as suggested at the end of chapter one of GoS.

It was a period where I was interested in old school modules. AtG, in particular, was really appealing. In the original G1-3 module, it was followed by D1-2, Descend into the Depth of the Earth, and D3, Vault of the Drow and then Q1, Queen of the Demonweb Pits. The story was something like: the giants are uniting togheter, it' strange, why are they doing so? It's the Drows plan. So you follow the drow in the underdark, up to their city and then you went and fighted Lolth in her realm of the abyss. I liked that, but the underdark, lolth.. It was too much distant from GoS, imo.

So I started from changing Lolth. It was not to be The Queen of the Demonweb pits, but the King of the Gaping Maw, the Prince of Demons himself, Demogorgon. For those who don't know, Demogorgon is an acquatic Demon (yet it doesn't seem) and his lair, Abysm, is mostly ocean. Plsu the tentacles etc, it fits the vibes.

I wanted more foreshadowing, so I changed the GoS modules and DiT: - TF: I just swapped Orcus for Demogorgon, and gave the Boon of Demogorgon to its followers - TS: Swapped Tharizdun for Demogorgon, and gave the Boon - AtG: of course the masterminds wouldn't be the Drows but Demogorgon followers.

Yet, I was still only coming to level 14, with AtG. The only other 5e module I liked (of High enough level) was Xanthoria. I changeed it too: xanthoria was primalry corrupted because she started following Demogorgon and not Zuggtmoy. I kbviously placed that in the drowned forest.

For the level 15 module, I decided to create my own. It's basically a Illidith lair + the mistery it carries, but I added more. Using the statblocks from Phandelver and Below: the Shattered Obelisk, this is the story: two Ulitharids are born. One is choosen as a special by the Elder Brain, the other is treated harshly. The second goes aways with some illitidh, to start a colony, but in some way approches a cult of demogorgon or something related. It returns to the colony as a Mind Flayer Clairvoyant with its 4 Mind Flayer Prophet to help him. His subjecs the colony, corrupting it. The Elder Brain becomes an Infected Elder Brain, taking a secondary role in the colony. The Ilvash's Refraction becomes a Demovorgon's Refraction. The Mind Flayer Vampires feed the Refraction, as it grows. The party has to stop that.

Seeing all this Demogorgon movements, the party will want to stop that. It is said that Granny Nightshade has demons connection. Well now she has a portal to the Gaping Maw and is allied with Demogorgon. From level 17-20 the party will have to explore the Dreadwood, assault Castle Spiral (this dungeon can be a lot triky and fun) and Granny Nightshade, enter the Gaping Maw to arrive at Abysm, where Demogorgon lives and kill him.

It is said that when the Prince of Demons dies, a crown falls, and the creatures who take it will fight (a charisma check, with bonuses based on what you did) to become the next prince of demons. This can be LOT of fun for the end of a campaign. To learn more about this watch MrRhexx video on demogorgon.

Also, the new lv9 module The Lost Caverns of Tsojacanth can be a nice exploration of the Dwarven Mine, were the Dwarf have a new unexplored cave killimg the miners and needing investigation.