It's only a Preview, the Datapack could have big bugs!!
Now you can add one special Effect on Iron, Stone and Diamond Tools and Armor. You also get the Feature to reduce the Cost for the Repair in the Anvil.
Drop this Item on an Enchanting Table to power it. You get a Book, in which you can find all the Recipes to power.
Night Vision [Helmet]
Stronger Legs [Leggings]
Xp cost reduce [All]
Faster Hit [Sword]
Auto Smelt [Pickaxe]
Drop the listed Items from the Recipe and the right Tool or Armor on the powered Enchanting Table to power. This Items are Powerable: