Jujutsu Kaisen: Shadow King.

Accidentally traveling back to his mother's womb, Mirai unexpectedly became Gojo Satoru's twin brother in Jujutsu Kaisen. But the two brothers, who both have six eyes, have led completely different lives from the beginning. Relying on the six eyes he was born with, Mirai pushes the Ten Shadows Method to the Two Shadows Method. Makoto adapts to everything infinitely, and Jadoro perfectly reproduces everything. Being able to kill someone once doesn't mean you can always kill them! Not being able to win once doesn't mean you can never win! With the strongest spear and the strongest shield, Mirai will dominate the world of Jujutsu with an invincible posture!!! ... Lufa: Where's my armor? Mirai: Give it to you! Sukuna: I admit that you are stronger now. Mirai: Don't forget, you are the challenger...