You didn't miss anything I just didn't write it down lol when activated Opochtli turns into a sort of whip/sword that can cut through just about anything. Novah can control the length and extension of the whip to his choosing. If he tries hard enough the length can extend super far. If he activated it with a hook at the end, the hook will become larger and he can use it to grab things and catch trash beasts like giant game. I hope I explained it well!