Slash!

Blood flowed.

After some slight struggles, Kieran fell to the sofa and his body quickly hardened while his face turned black.

"The bloodline of the half-fiend is powerful but unfortunately… You are not immortal!"

"I'm so sorry."

Zackary said quietly and after an apology, he slowly pulled out the knife from Kieran's heart which was drenched in his blood.

He took out a seed that he hid on himself and placed the bloody knife over it, watering it with drops of blood.

The seed was thrown on the ground and soon, it sprouted at exponential speed.

A flower bud sprung out from the ground and it was looking exceptionally bright in color.

Puk!

Zackary suddenly stabbed himself on the chest with the knife!

Blood flowed along the blade and watered the flower bud. 

Zackary didn't seem to feel the pain from the stab, instead of pulling it out, he twisted the knife in his chest.