Synopsis

MC will be Transmigrated as Harry in HP /DxD world.

What if Harry didn't grow up with Durslies? What if he was taken in and was allowed to grow to his full potential?

A kind old lady took baby Harry in and watched him grow into a monster. 

OP Harry. Smart Genius Level Harry. Mad Scientist. Experimenting on himself and others. 

Doesn't Give a Shit. Voldemort is Back? "Not my problem"

You want a cure to save your dying wife? "Pay up!"

Make an untraceable poison to assassinate a dictator and lower the price since its for a good cause? "Pay UP! Double the price!"

Spare my life, have some mercy? "Sure, I was just getting low on test subjects. You probably are going to regret asking me this" 

Lots of HP Bashing.

MC doesn't care much about DxD bullshit. He will still have contact with various factions and suppliers. After all research is expensive. Very Expensive!