General Enchantment Idea

Unique enchantments should Always be level 4, one level higher than anything you can get. This will make an unique truly unique since the enchantment they have will Always be stronger than what you can get normally. All enchantments should be able to become common or powerful. So we could see powerful version of multishot or infinity for example, but at a higher enchantment cost and being very rare. I think it would be really fun to have a new enchantment type: Legendary. These are more powerful than the "powerful" type enchantments but costing even more enchantment points and being extremely rare. Also they would have a maximum of level 4 to enchant like enchantments on a unique. But the difference is unlike unique enchantments, these legendary enchantments would extremely rare and cost alot of enchantment points.