Shadamy au: Cursed ghost (Patreon)

Au, where Shadow  was never been an ultimate lifeform. He and Amy fell in love and were ready to get married.

But at the end of the wedding there was an accident, and Amy died from lack of blood.

Shadow crushed to death by beams. However, he became a ghost full of revenge.

He has the blood of all those involved in Amy's murder on his hands.

p.s In this universe, they have different eyes colors. Shadow's are more orange, Amy's are turquoise.