Prototype of a future story.

Izuku Midoriya is a boy who aspires to be a hero despite being Quirkless, but his life changes when he discover the responsibility he must carry as his ancestor King Arthur, Excalibur, forged when the world was young, and bird and beast and flower were one with man, and death was but a dream (Multi-crossover with King Arthur LOTS, Nanantsu No Taizai and another Arthurian stories)