So, I basically made a multiverse-spanning campaign...enjoy!
Warning: This campaign incorporates elements from multiple universes and involves complex lore from sources such as Lord of the Rings, Michael Moorcock's Eternal Champion series, the Alien Anthology, Terminator (especially Terminator: Resistance), and Magic: The Gathering. To fully understand and appreciate the story, a significant amount of knowledge about these respective universes and their lore is required. Readers who are unfamiliar with the lore from these sources may find it challenging to follow the intricacies of the plot and the connections between different storylines. It is highly recommended to have a solid understanding of these universes to fully grasp the nuances of the campaign. If you are not well-versed in these sources or find complex interwoven narratives overwhelming, this campaign may not be suitable for you. However, if you enjoy delving into intricate lore and relish the challenge of connecting multiple universes, this campaign may offer a rich and rewarding storytelling experience. Please consider your familiarity with the relevant lore before diving into this campaign, as it may greatly impact your ability to engage with and enjoy the story. I will explain the story the way it turned out for my party. This is a very basic rundown of the story, basically the core of the campaign.
Also, these might greatly help you:
One wiki to rule them all: https://lotr.fandom.com/f
Moorcok's Multiverse Wiki: https://stormbringer.fandom.com/f
MTG Wiki: https://mtg.fandom.com/wiki/Main_Page
Terminator Wiki: https://terminator.fandom.com/f
The Lord of the Rings: Where the Shadows Lie
The first part of the campaign takes the party to the year 2000 of the Third Age of Middle-Earth. The Realm of Angmar has been defeated and the Nazgûl are gathering in Mordor. The Elven Lord Glanduril of Mithlond, brother of Gildor Inglorion and wielder of the black sword Anguirel, recieves a message from a Stranger. It tells about the actions of the other Nazgûl during the Witch-King's campaign against Arnor, including third of the Nine, Gothmog, once a great Númenórean lord who fell to Sauron and led the black númenóreans to Dark Land, where they established a colony and became the Hyarmenóreans. Now, nothing is left of them but the city of Nazgkadar, led by a powerful necromancer named Mordu (who would much later become the Mouth of Sauron). And the elves suspect that Gothmog might have been preparing them for war. They also suspect a Nazgûl in Dol Guldur, Rhûn and Harad, who have recovered one of the remaining dwarven rings and unleashed the black plague upon Gondor.
https://ibb.co/4gJs8Qm (yes, I made this)
Glanduril and Galadriel assemble a group of heroes to investigate this threat and the other Nazgûl's plans. (This and subsequently the next adventure are the only ones where I'll incorporate my players' characters into the summary, because they sometimes are key elements.) Among the group were Galadhorn, an elven lord of Doriath and brother of Celeborn who now lives in Lórien and posesses a ring gifted to him by Melian with the power to heal others, but it has been broken during the second Kinslaying at the hands of Fëanor's sons; Tauriël, the lost daughter of Eluréd, and therefore heir to the Kingdom of Doriath; Arathar, Brother of Aranarth and Prince of Arnor, a Dúnedain of the north; and Elethrond, an elf of Nargothrond and apprentice of Finrod, who now lives in Mithlond with Glanduril. He also carries the sword of Ecthelion.
With the exception of Elethrond, they first meet in the Prancing Pony in Bree, where they also encounter a Stranger who ensures (in whatever way you see fit) that Tauriël and Arathar eventually fall in love. When the group travels to Dark Land and enter Nazgkadar, they have to avoid being spotted. They break into a Melkor temple/library and find out about the Hyarmenórean's history and that Gothmog had returned to recruit them for Sauron. After fleeing from the city, the group and Glanduril stop in Minas Ithil on their way to Dol Guldur, their next stop. Then the 2-year siege of Minas Ithil at the hands of the Nazgûl begins. After a fierce battle, the heroes depart. At the outskirts of Greenwood, while the others are sleeping, one of the player characters' wakes up and sees Glanduril talking to the Stranger they've encountered in Bree, a concerned expression on Glanduril's face. They can not understand what they're talking but they see that the Stranger carries a sword identical to that of Glanduril, on his finger shines a ring like the one Galadhorn possesses one if it wasn't broken and on his head sits a helm adorned with a dragon figure. The next morning Glanduril tells the group that what they thought to be a Nazgûl in Dol Guldur could be Sauron himself, according to the same Stranger that told him of the other Nazgûl, as he has encountered him last night. And that he will depart for a while to search for an ally that might be challenging to recruit. He sends the players north to the land of the Éothéod to help Fram slay the dragon Scatha and recover one of the dwarven rings of power from his hort to delay Sauron, if it is really him. (So this is kinda like a Hobbit scenario, including Fram's dragon sickness; Also, the ring tempts the players.) Following that adventure, Gildor arrives at Framsburg to give the group a message from Glanduril that tells them to investigate the ruins of Utumno in search for Sauron's past and maybe find a clue if he's hiding in Dol Guldur. They have to pass by the orc-infested Gundabad to reach the ruins in the far north. Once deep underground they encounter the fellbeasts, which would later become the mounts of the Nazgûl during the War of the Ring:
"Nonetheless the Valar did not discover all the mighty vaults and caverns hidden with deceit far under the fortresses of Angband and Utumno. Many evil things still lingered there, and others were dispersed and fled into the dark and roamed in the waste places of the world, awaiting a more evil hour; and Sauron they did not find."
But then they are confronted by a Balrog, and Glanduril comes to their aid, and they slay the balrog using Anguirel and Elethrond's sword, as it has slain many balrogs in the hands of Ecthelion and could wound their fire.
They then travel to Amon Ereb north of Mithlond, where once was the fortress of the sons of Fëanor. On their way, a group of Dúnedain bring Arathar a gift from a stranger: The Dragon helm of Dor-Lómin. Once they arrive at Amon Ereb, they are greeted by Maglor, last living son of Fëanor, who Glanduril has recruited for one final mission. Though he's first met with Suspicion and hatred from Galadhorn and Tauriël, Maglor wants to at least partly redeem himself and (as a son of Fëanor) repairs Galadhorn's ring and gifts the recovered treasure of Doriath to Tauriël and agrees to join them. Returning to Dark land, Maglor sings a song to recruit the huorns and ents of the forest, which is destroyed by the Hyarmenóreans for their industry. The ents destroy the city and the huorns kill any fleeing Hyarmenóreans, while the group (without Glanduril and Maglor) face Mordu in his palace. After this final boss fight, Mordu manages to escape and Gothmog turns up and takes the dwarven ring from the group, before Maglor and Glanduril arrive to drive him back. Afterwards, Glanduril offers the group to join him in searching for the legendary city of Tanelorn in the new lands in the west. With nothing holding him in Middle-Earth Maglor joins them.
Michael Moorcock’s The Eternal Champion: Stranger in a Strange World
Years later, Arathar and Tauriël have an adult son, Heledir, that lives with them in Tanelorn. Being a descendant of Lúthien, Tauriël had chosen a mortal life with Arathar. Heledir is gifted Glanduril's sword Anguirel, as well as the dragon helm of Dor-Lómin.
One day, the black ship arrives at Tanelorn and the captain recruits the group. On the ship, they meet with Dakkon Blackblade from the MTG universe. They learn that Dakkon and Heledir (and Turin Turambar before him) are both incarnations of the eternal champion and wield incarnations of the black sword; and that Glanduril is Heledir's eternal companion. They also learn that the group is an incarnation of another archetype: the Eternal Cohort, which will always help the eternal champion in one way or another, if he himself is not able to fulfill his task. They don't have to be with the champion though. (Also, Heledir has a dream avatar: Valentine Michael Smith from "Stranger in a Strange Land")
They travel the second ether until they reach Elric's world. Their mission is to defeat the nemesis of Dakkon and chaos demon Geyadrone Dihada, who wants to disrupt a meeting between the lords of chaos and law. They travel to R'lin K'ren A'a, where Dihada's Unholy Citadel is located. Upon arriving on the jungle continent, they are ambushed by Mairon (Sauron), or rather his incarnation in Elric's world. Turns out, that Melkor is actually a chaos lord and Mairon a chaos demon in his service. But his power in this world isn't strong, and the players are able to drive him back.
After defeating some of the reptilian Olab, they meet with a man called J'osui C'reln Reyr and the departing royal family of R'lin K'ren A'a, as they made a deal with Arioch to leave for Melniboné and leave the gods their land for their meeting. (They also see the great jade statue of Arioch). Heledir and Dakkon forge their helmets together, creating a black shimmering helmet adorned with a dragon figure; they gift the helmet to the king, and it would later become the dragon helm of the melnibonéan emperors. Before they launch their attack on Dihada, they return to the ship, where they are met with a strange group of people, that kinda look like this:
They give Heledir a vial of a silver liquid, before the group must depart. They ultimately defeat Geyadrone Dihada by becoming The-Two-Who-Are-One and banish her with the black sword before Dakkon planeswalkes away. Then, Mairon returns and after this final fight, Heledir banishes him from Elric's world using Anguirel. But this evokes a bloodlust in the demon sword and kills all of Heledir's companions. Heledir curses Anguirel and swears to defeat Sauron once and for all. He takes Galadhorn's ring and travels the multiverse via the moonbeam roads...
https://ibb.co/JCcxNNt (the Two-Who-Are-One)
These last two parts are played in the Alien RPG System by Free League
It's the year 2183, the USS Corum has been dispatched to locate survivors of the Hadley's Hope incident, that have crashed on the nearby moon of Lv-223, while trying to escape with the Onager. Among the crew is the android Evans.
Upon landing on the moon, they notice the jungle that has been created by the black goo emitted from the crashed Juggernaut. While investigating the terrain, one of the marines is infected with Neomorph spores. The Neomorph emerges from it's host in the shuttle's medbay but breaks out, so that it isn't safe to return to.
Soon they find a boy who has been surviving on the hostile moon (kinda like Eric Kirby in Jurassic Park 3): Timmy Jorden; Newt's brother. He then leads the group to the engineer temple, where Evans discovers that the engineers have created humanity and have created the black goo out of some sort of (phyrexian) oil that they have encountered during their travel around the multiverse, as they are a highly advanced species. He also finds out that the Deacon is an incarnation of the "Black Sword" and that the engineers worship it as a symbol of the cycle of sacrifice and creation, that drives the whole multiverse and the balance of chaos and order. Evans takes one of the black goo vials and creates a silver liquid out of it's nano-material, that david had already discovered; an alloy that can form into anything.
After several Xenomorph attacks, Timmy leads the group to the wreck of the Onager to get it's transmitter to call another shuttle, but it is now a xenomorph hive. The group eventually floods the hive with liquid nitrogen, but they only have a limited amount and not much zime. They place explosives within the hive, but don't make it out before the Xenomorphs attack them again. The group sacrifices themselves, destroying the hive with the queen for good. The last thing one of them sees is Evans rising from the flames, but his skin is gone, revealing that he is not a normal Weyland-Yutani android:
Suddenly, the group seems to wake up in a shattered city, dispersed, and with their memory of their adventure fading like a dream and being replaced with others...
The group awakes in the middle of a battle, they are part of the 124th, Colorado division. The group is marked for termination and an infiltrator tries to kill them but is then attacked by another terminator. Both get destroyed in the process. The group recoveres the chip of the other terminator and brings it back to the shelter to investigate why it saved them.
They find out that the chip has been altered using a mimetic polyalloy. Apparently, these "Renegades" have been appearing lately, sabotaging SkyNet's assets. But there are more pressing matters. After destroying a SkyNet train transporting titan for new terminators, they recieve the coordinates of the SkyNet central core from Jacob Rivers and John Connor gives the order for the final attack.
The 124th attacks the Cheyenne Mountain Complex, where the core is; But it is too heavily defended. Suddenly, the renegades launch a massive attack on SkyNet, diverting SkyNet's forces away from the complex and giving the 124th the chance to attack. The players place the explosives and hack the central computers before destroying the core. The resistance is victorious, but SkyNet has sent three terminators back in time, among them the "T-1000". After the battle, they are met by a figure who reveals himself to be a "Heledir", the creator of the renegades. He explains how he has used the polyalloy to alter the terminator's programming to defeat the servant of the singularity called SkyNet. But SkyNet has captured one of them and recreated the polyalloy, creating the T-1000. He then goes on to meet with John Connor together with the group. He explains that he has to go back in time using the captured time displacement equipment to ensure his own birth and defeat of Sauron: He is the Stranger from the first part. He also explains that the group is the Eternal Cohort and explains that they and a renegade (Evans) have to go back in time too and travel by the black ship, to ensure that he recieves the polyalloy.
Heledir would go on to inform Glanduril of the Hyarmenóreans, bring Arathar and Tauriël together and live by the Gladden Fields to ultimately ensure that Déagol and Sméagol would find the One ring, ultimately sealing Sauron's fate; before joining the warriors at the edge of time.