Add learnable Skills!

I once read a Minecraft style book that I found very enjoyable, and it had these things I'm not sure what they called it but it allowed people to learn and use use unconventional skills for instance Artisan; turns the 2*2 inventory crafting grid into a 3*3 like a typical crafting table Duel wield; allows you to carry and use a sword in your off hand to name a couple, I thought this was a really cool idea, that could be really fun and useful adding an interesting dynamic. I'm thinking you could gain these skills by reading a special book; basically press place well holding the book for 30 seconds and bang you got the skill and keep the book, the effect could end when you die or not, and maybe you can learn upto 3 skills at a time and by learning a new one you forget the oldest one you learned, you could find these skill books in village libraries, or maybe in loot chests/chested book shelves in various structures. Ideas for skills could be: Stealth Sneak; gain the invisibility effect well sneaking Deep Breath; allows you to breath under water twice as long would love feed back and ideas