White strikes

Izuku is born the son of Allmight, quirkless and innocent he had one friend who bullied him, Bakugo, he was taken away by all for one and never found. All for one learnt to merge quirks. He stole a fire quirk from the oldest of Endeavours children and merged it with a black smoke quirk that makes people choke and he handed it over to Izuku.
Izuku became a villain, he doesn't know who his mother is and believes Dabi is his father.