Rick takes Morty to Forbodulon Prime to harvest these crystals. While there, Morty discovers a vision of himself dying peacefully as an old man, comforted by his crush, Jessica. Obsessed with reaching this specific outcome, Morty begins following the crystal's prompts blindly.
Morty's erratic steering to stay on his "path" causes a crash that impales and kills Rick.
Morty uses Rick's advanced weaponry to go on a rampage, eventually transforming into a giant, sentient ferrofluid monster—a direct homage to the anime Akira . Subplot: Rick's Multi-Dimensional Rebirth
He finally lands in a "wholesome" Wasp dimension that isn't fascist. The Wasp Rick helps him return to his home reality to deal with Morty.
A holographic backup of Rick appears to guide Morty through the process of cloning him back to life. Morty refuses, as the crystal shows that reviving Rick would lead away from his future with Jessica.