Enma is either:
- a strong sword that is benefiting him.
- Or Zoro is a fucktard for using it rather than Wado for his one sword techniques, and a fucktard in general for using a sword with downsides such as risk of draining him dry.
All swordsmen covet these magical top tier swords, they can't all use them, but they all respect them and the boost they give.
So is Zoro a fucktard or is Enma giving Zoro fighting strength (or both)?