The Strongest Mentor Across All Worlds

Mo Lin starts out in a zombie apocalypse and takes in Scott, a young mutant with laser eyes, as his first disciple. Drawing on his knowledge of multiple worlds and the wisdom of a mentor, he goes on to save characters whose stories ended in tragedy in worlds such as Demon Slayer, One Piece, and Bleach, taking Zenitsu, Gaara, young Byakuya, and others as disciples. He teaches them more than just abilities, guiding them as they grow in character, too. Meanwhile, he establishes branches of Return Mountain across the myriad heavens, attracting wanderers and building a sect that teaches its followers how to fish rather than simply giving them fish. Along the way, he contends with the Space-Time Administration and fights the Abyss's minions in bloody battles, gradually clarifying his philosophy: true strength means kindling more sparks.