So this is my idea, well my seecond.
MAGIC, the idea is like you learn spells and improve them.

first to learn a spell you need a element, what is that? and element is a new drop from wicthes.for example water and fire element. and after you have goten and element you craft a book.

the book and element gets combined with some stuff.
R=redstone G=glowstone dust B=book E=element.GB=glowstoneblock

RGR GB B GB
GBG B GB B
RER makes and spellbook. GB B GB book of spells.

so you see the recipe for book of spells, but what is it? the book of spells is a book that you can keep your spellbooks inside. and also makes it possible to uppgrade them.
now to the staffs.
A=nothing S=stick B=blazerod.E=element.

AEA AEA
ASA ABA
ASA ABA

the staffs are used to cast spells with more power, and just looks awsome. the type of element you use choose the type. and if you use blazerods it's more powerful.

now that is all of the crafting for now.

so we have books and staffs.
now we need souls to uppgrade.
if you have the master book(the same recipe as book of spells just use book of spells instead of normal books)
and a empty glass and staff, you kill and enemy with the staff(need one xp level) you get a soul from the creature(for example "soul of the living dead" that is a skeleton or zombie soul) and use them to uppgrade the staffs and spells.

now finally the good stuff. you right click the master book and a G.U.I opens, you have a section for the staffs, and section for souls. you use souls to "enchant the staffs" it's kinda like and crafting table grid, you just have a slot for the staff and slot for the soul, and a slot for the mob drop. so, zombie soul staff of fire and rotten flesh gives the, staff of burning dead 1. and doing the same again while give the staff of burning dead 2.

now the best spell staff would be the staff of withering. you don't use and element to craft but a nether star. now right clicking the ground would transform it to a nether type, dirt=netherrack.
and the best right clicking mobs would wither them, insta kill. now this might be a bit op, but realizing the nether star is preety damn hard to get, so i think it would be ok.
now to make it a little less op it would need a xp level to operate unless it have been upgradet. you would need another nether star for that.
now there is a lot of other awsome staffs i have tought of like the staff of recarnation, bring the dead back to life, turning them to your minions. you would of had to "enchant it" with and mob drop and the staff would only work with that type. and it would cost one soul and mob drop from that type for each minion.
hope you like the idea and i will try to decorate the blog with some photos.