We all witnessed the way the Avengers defeated Thanos in the Marvel Cinematic Universe (MCU)but in the universe of comics the Mad Titan has other weaknesses, one of them unknown until now.
The website of His house quote the comic Thanos #13 2016, created by Donny Cates and Geoffrey Shaw, which explains a connection between the Titan and Juggernauta powerful X-Men supervillain also known as Cain Marko.
That connection between the characters reveals the one thing Thanos can seem vulnerable against and it has nothing to do with the Infinity Stones.
Thanos’ unknown weakness
Throughout the history of Marvel comics, Thanos has gone on quests for valuables and cosmic weapons to destroy planets and win wars. He had in his possession the Cosmic Cubes and the Infinity Stones, but he was never able to conquer the Bones of Cyttorak.
In issue 13 of the comic titled Thanos, the Titan is defeated by Cosmic Ghost Riderwho binds him with a chain forged from those Bones, dragging him a million years into the future.
When Thanos is tied up, he loses all his strength and is left at the mercy of his enemy, a moment that occurs by order of King Thanosa future version of the Mad Titan, who knows the weakness of his other self.
The relationship with Juggernaut is because he is the avatar of Cyttorak and his power comes from the Demon God through the Crimson Gem. Therefore, Thanos’ weakness against the Bones of Cyttorak is due to the fact that the Titan is weak against this evil entity and Cain Marko could defeat him whenever he wanted.