Runic tomes - new combat class

My suggestion is to add runic tomes, these would be special items that can give magic powers specifically to leather armors (logically runes can be written on leather) This would make leather a lot more usefull and it would add a new combat class with new playstyles to compete with netherite armor. I think there would be greater combat diversity and the game would be more fun with this addition. I'd add them like this:

•How to obtain them: First of all I'd add the Iceologer to make this addition even more fun, Iceologers, evokers and endermans would be the ones that drop these tomes

•How they could work: Tomes can treat about usable or passive abilities. Usable ones are appliable to pants/boots (left/right click + an extra slot will appear in hotbar to use them) and passive ones to helmet/chestplate. An anvil is needed to apply tomes. In adittion, the use of each ability would consume a portion of the food bar, making food and saturation more important

*Abilities ideas (2 and 3 are not compatible):

-1. Holding a totem buffs your magic damage (dropped by* Evoker, passive)

-2. Summon fangs around you when receiveing damage (*Evoker, passive)

-3. When you receive damage you slow down the enemy dropped by (*Iceologer, passive)

-4. Damage taken by the use of ender pearls is removed (*Enderman, passive)

-5. Skillshot that slows down the target (*Iceologer, usable)

-6 Drops an ice chunk on a target (*Iceologer, usable)