Start with Double Armor! I Protect My Sister Bibi Dong!

In that blizzard that could bury the world, when she was four years old, she fed the only piece of dry food in her arms to me who was still an infant and had just been picked up by her. From that moment on, she was my only light in this lonely world. We depended on each other until I was six years old, during the martial soul awakening ceremony, I looked at the humble yet hot expectation in her eyes and made my first vow to the world. ——The world responded to me. The bright protection of [Emperor Armor], the monstrous killing of [Shura Armor], the god-level twin martial souls were born because of her, just to exchange for her peace for the rest of her life! However, I have long known the "script" of this world - in this cruel [Soul Beast Continent], those sanctimonious and hypocritical gods above the sky have already written for my sister, who is known as the world's greatest genius, an eternal tragedy full of betrayal, pain, and ultimately becoming a "god's puppet". Want to make her cry? Do you want her to feel pain? Do you want her to become an involuntary pawn on your chessboard? Very good. My name is Su Chen, and my ability is called [Equivalent Exchange]. I can tamper with cause and effect and define all things, so... You can call me the "law of cause and effect killer". I will tear apart the false destiny you wrote! I will sacrifice the fate of your "sons of destiny", I will subvert this unfair worldly law, and I will pay any price you cannot imagine... Just to give my sister, Bibi Dong, a flawless and radiant ending. For her, define a new, free, unfettered