Are there actually Blades with 3 or 4 crowns?
Yes, you can get those. I believe you get them more commonly if you use rare or legendary core crystals, but don't get a rare blade. See:
Are there actually Blades with 3 or 4 crowns?
Yes, you can get those. I believe you get them more commonly if you use rare or legendary core crystals, but don't get a rare blade. See: