Hogwarts: Star of Bloodline and Vow

[Synopsis]

After transmigrating to the Marauders' Era, Lin Yanqing finds that his System can only make cute emoticon faces 😝. He is also forced into a soul-binding contract with the Bat King, Snape. When a Dark Magic organization comes after them with an evil mirror that reflects the soul, the two sworn enemies are forced to dance naked in each other's magic 💃.

“If the contract breaks, we die.” Snape pinned him against the potion cabinet and roared, “Back out, and I'll brew you into a Love Potion!”

But on the night the mirror's light tore through their souls, it was Lin Yanqing who grabbed the curse aimed at Snape with his bare hands. Blood dripping, he smiled. “So, which of us is whose Love Potion now?”

The shattered mirror reflected their magic intertwining in a frenzy, and revealed the future as well:

Why does The Chosen One call Professor Snape “Dad”? Why are there two pairs of wedding rings on Dumbledore's bedside table? And why does that heterochromatic baby carry the bloodlines of the two greatest wizards of the century ✨?

When all their threads of fate converge with a thunderous crash, they realize that the contract born of a conspiracy has long since become the most terrifying taboo in the Wizarding World...