Post BBEG Concepts

An old adventurer who decided he rather liked some of the monstrous races ladies a bit too much and decided to go Ghengis Kahn.
Does it count as magical realm if the campaign objective is to kill my self-insert?

A typical fa/tg/uy neckbeard who was somehow stranded in the world. He has all of the source books and expansions in his possesions, as well as an enormous wealth of meta and OOC knowledge. His fantastical dreams have come true, and he would be happier than it's possible to comprehend, but there's one problem.

It's the wrong edition and his severe autism won't let him get over it. His plan is to destroy reality, which he believes he will survive as he is not part of the fantasy reality, and reshape the world in his image, under the *Insert_Ruleset*, as it should be. He isn't threatening on his own, but he knows all of the party's plans before they ever make them, and he's always two steps ahead.

PCs have macguffin that will prevent apocalypse, but no one believes them, and in order to take it where it needs to go they must win a majority aproving votes from the ruling council, and they only have 80 days.

Also the apocalypse is just a proxy conflict the Blood War, PCs are strong-armed into aiding the dukes hell, who want to avert the event to prevent demons from gaining an apocalypse-worth of souls. (Previous events established a one-way planar syphon sending every soul from this planet directly to the abyss)

You forgot about the old lord who inhabits it cursed with lycanthropy by a witch and who will die soon if he doesn't learn to love

A tiefling barbarian who leads a tribe full of demon cultists, born from the union of the tribes priestess and a powerful demon, and is hellbent (badabumtss) on conquering lands and expanding.
Extra clusterfuck points if he tells the demons to go fuck themselves and goes against them as well and the invasion devolves into an all out war between hell, the barbarians current army and a few nations both repelling the barbarians and eachother using the chaos as an excuse to conquer other smaller (or fallen) nations.

Lol, i once had a similar idea. It was a mimic inn in the middle of the forest, and most pieces of furniture were mimics as well. Pity i didn't play any sort of tabletop games back then, would have loved to use this concept

A king so benevolent, with a court of wise and amicable nobles, taking pride in the long history of welfare their people have been, under that line of royalty.
But in reality, that palace is funding other kings, in kingdoms with either no resources or very important resources, to either apply a tyrannical rule over their people or to buy their resources and apply a tyrannical rule to their people, so that the benevolent king can provide his subjects with lots of goods and appear kind and generous, juxtaposed with those other kings.
What the money goes to, is loads of loti (the plural of lotus, the fruit that causes forgetfulness and bliss) being bought with the money of the king. The lotus growers also provide all kinds of services to the king: assasinate dissidents, provide information about dissidents in every kingdom and other kings and regulate the price of the lotus to fit the current fiscal ability of the king.

Dmpc dragonborn eldritch knight the player help make into a war chief of his tribe by helping him kill his rival and getting his hand on the chief prize weapon bonded.

fa/tg/uy becomes stranded in fantasy world and discovers that his in-game knowledge is actually applicable. He becomes a powerful wizard, due to possessing virginity after 30 as well as through actual magical training.

He slays monsters, explores lands both near and far, and loots dungeons. This fantasy is a dream come true.

Over time the mystery and the magic in the world begins to wane. The elves and the dwarves and the succubi and the thicc half-orcs and the slime girls all begin to disappear, and the world begins to look very much like Earth.

Veeky Forumstg/uy doesn't want this. Having lived the dream, he can't allow things to return to the way they were back in his original world.

He begins to do everything in his power to propagate monsters and mystery and magic, much to the dismay of humans who were starting to enjoy not being burned by dragons, plagued by undead, and enchanted by fae.

Works in high and low fantasy games, both small and large in scale.

A cursed pale white diamond coin that leads everyone who owns it into greed to collect and hoard riches at any cost, hate for all but the coin, and an all-consuming obsession of the coin that's borderline worshiping in its intensity. It attracts those more powerful than its current owner to steal the coin any way possible, and its eventual goal is to corrupt the God of Wealth himself, ascending and taking his position by force or at least proxy.

The party must track down and destroy the coin, defeating or outwitting its many owners, and upon capturing the coin, handling its corrupting influence and the many monsters and thieves that wish to have it for themselves. The coin can only be destroyed by tossing it into a lake of solid moonlight in the elvish lands that only lights on the full moon once every thousand years, during a highly important elf-only religious ceremony where hundreds, if not thousands of elven clerics will be present, under divine orders to protect the moonlit lake from all non-elf and non-priest intervention with their lives if necessary.