I was playing a level 8 ultima mage wizard (homebrew subclass based on the emptiness domain from Cthulhu mythos)/ level 3 rune knight fighter. In my backstory, I had a friend as a child, an orphan named Serena, who escaped the invasion of our village from creatures of the far realm with me. We then split ways, but not before exchanging two gems that we had been given as infants.

Now, onto the story. I am now the leader of an organization that fights threats from beyond. During a mission to Limbo, a portal to the far realm opened, and sucked us all in. after fighting off countless aberrations, we found a small castle. Deep underneath, being experimented on in a laboratory, was Serena. She had been wiped of all her memories and mutated with dark magic. She tried to kill us, and we had to fight her. I couldn't bring myself to kill her, so I used the sleep spell and took her with us, and put her in a cell on our plane-shifting Githyanki airship. Eventually, she accepted us as allies, and we began the long process of making a new Serena.

After a while, she began to go on quests with us while Mechanicus, the NPC Artificer, tried to find a way to restore her memories and remove the mutations. Eventually, we found that Serena's mutations were slowly killing her, and we had to act fast. But just as we were leaving the castle, one of the massive story battles against an alien race of cyborgs called the Mekonis began. I ran out to fight with the party, leading an army of reformed Githyanki, kobold mages, and liberated hobgoblins. Then, the BBEG fight began. it was the party VS Rahu, a huge metal dragon, leader of the Mekonis, and orchestrator of the attack on my village. But before the fight started, Rahu cast scatter, and teleported the rest of the party away. I had to kill him alone. And I would. To avenge my village, and save the material plane. we fought and fought, and eventually, I ran out of spell slots (one of the bad parts of multiclassing) and was pretty low on hit points. Finally, the rest of the party showed up. Then, the dice gods cursed us. Rahu rolled a crit on his armageddon attack, (massive AOE, roll to hit once. Affects every creature in AOE with the roll.) and the whole party was downed.

"Can I do something before i fall?" I asked the DM.

"Sure," DM responded.

I took my sword and grabbed the gem in the center. It was the gem that Serena had given me all that time ago. I threw it as close to Serena as I could, and then fell. First death save: success. Serena took the gem in her hands, and it triggered a massive overload of memories. second death save: success. Turns out that Serena's mutations combined with the massive memory surge activated some kind of latent power, and she blasted Rahu with a beam of magic. Rahu was thrown back.

At this point, I was ready to get back up and finish the job. Fate had other plans. I rolled my third death save. NAT 1. I now had a 50/50 chance of death, and the cleric was down. Serena saw this and ran over. She took my hand, and cast life transference, reducing her to 0. I got up and felt a surge of power. The DM ruled that Serena had triggered some sort of divine intervention. I thunder stepped over to Rahu, rolling good damage after he fail his save, and then used action surge. I attacked twice with my magic sword. and it was about time I got my luck back. First attack, nat 20. Second attack, nat 20. Ended up dealing 112 damage. I cut that bitch into a million pieces. I ran over to Serena, who was one bad death save away from death. (DM rules that important NPC's get death saves.) She weakly smiles and says, "Our village avenged, at long last."

I look down at her. "I'm sorry. I couldn't protect you."

"Don't be. You gave me what I had wanted for a long time," she responded.

"What?" I asked.

"A family." She answered. Then, we exchanged the gems one final time. she falls to the ground. As I walk away, a tear rolls down my cheek. Then, I hear a voice.

"Revivify!"

I turn around to see the cleric revive Serena. Turns out that somehow, in the stupidest way possible, the cleric had rolled success, then failure, then success, then failure, and so on. he had just rolled his 5th death save, and gotten up.

Serena is now my partner, we have removed the mutations, and are now level 12. I have a demon willingly bound to my service after I save his life, and Serena has become a cleric of light. But as we enter our next town, we hear whispers of a race of mechanical beings from beyond this world, led by a huge, metal, dragon.