This Trainer Is so Hellish

In the age of elves, you dreamed of becoming a trainer, but you awakened the necromancer system! Refining corpses has become your daily routine. You buried a Pikachu in a shroud and got a "zombie Pikachu". One hundred thousand volts can make people flee. You buried an Eevee in the Elf King's coffin, and obtained a "Vampire Eevee" that sucks the essence and blood of all things. You buried a fire-breathing dragon with the blood of ancient elves and obtained the "Evil Fire Bone Dragon". The flames can burn the soul. … Unknowingly, you led the army of undead to sweep through all competitions and keep marching towards the road of king. When people talk about you, they always say: "This trainer is from the underworld!"