Long ago the King of Leviathans was sealed into the deepest trench vowing one day he will break free and reclaim what was his more specifically his dear precious pearl. Fantasy AU, MerIzuku, and DFO goodness.

Young Izuku Midoriya was born with an extreme snake mutation despite neither parent having a physical mutation, and at the age 4 he got is quirk, but all it did was give him a human form by shedding his skin. At 5 he met a man who says he can make his quirk stronger so he can be a hero. - "Dream... Again..." Thought Izuku as he started to uncoil his large serpentine body "hungry.."