People overrate the "invincibility" of Lunarians to high heavens. It's just really high imo. Not invincible at all. ie, with sufficient damage, they can be hurt and killed. Otherwise, King turning off his defensive mode against zoro after seeing zoro use advcoc is retarded. King could have just chose to tank everything and defeat zoro after he was exhausted. King knew zoro wouldn't last long. But, he was scared and chose to end it as soon as he can and opted for the speed mode. That to me means his defense wasn't all that. Could be proven wrong in the future. We are getting some lunarian stuff soon i guess, with all the Seraphim and all.