How to make an enchantment with more than standard allowed max level? [duplicate]

I've seen a lot of lets plays and vanilla servers where players used swords with, for example, Sharpness X (but max allowed level is V). Or, also, I saw modded severs where you can donate and buy Nano Sabre from Industrial Craft with Sharpness XVII. How can I get such enchantment with in game methods? Is there some mod to do that? I tried Enchantmets Plus and More Enchantments mods but there is no such ability. I want be able to combine two Sharpness V (or any other enchantment, not only sharpness) books in anvil and get Sharpness VI book instead of Sharpness V again.

Solution 1:

You can use commands to create items with any enchantments:

/give @p iron_sword 1 0 {ench:[{id:16,lvl:10}]}

There is no other way in vanilla. Someone else might know a mod that does that, though.

Solution 2:

The mod you are looking for is called SuperEnchants.

SuperEnchants mod allows you to enchant tools that have high levels. Note that you will need 30 levels and a enchanting table with maxed out levels. The higher the level you use to enchant, the luckier you will get. Enchanting something next to lvl 10 will lead to NEAR impossible..

Enchantments that their limits have been increased or changed:

Sharpness Levels up to 10 [X] 
Fire Aspect Levels up to 10 [X] 
Looting Levels up to 5 [V] 
Knockback Levels up to 5 [V] 

Efficiency Levels up to 10 [X] 
Unbreaking Levels up to 10 [X] 
Fortune Levels up to 5 [V] 

Protection Levels up to 10 [X] 
Projectile Protection Levels up to 10 [X] 
Blast Protection Levels up to 10 [X] 
Feather Falling Levels up to 10 [X] 
Thorns Levels up to 5 [V] 

Power Levels up to 10 [X] 
Punch Levels up to 5 [V] 

Solution 3:

If you are looking for a no cheating aspect, then the mod Orespawn adds many new dimensions with various boss battles and new ores that can get you the type of enchants you are talking about. For example, once you beat the King you get King armour. This gives you, among others, Protection 10. If you want to not only get these enchantments but also want to add a certain amount of adventure and challenge to getting this rather end-game items then I would defiantly recommend it. If you want to read more, you can find the Orespawn website has tons of Information that you may find useful.