Shoots Fireball,summon allies,creates a green shield that can protect and many more.Magic Madness addon adds different type of staffs,each hold different element.Obtain all the staffs,Mastered all the spells and become the most Powerful Wizard in your world.
You'll need to find a stone mason villager and trade your emeralds for the crystal.Each crystal costs 20-30 emeralds,so make sure you bring enough.
When you have crafted 20-30 of these,the next thing is to trade from a librarian.Exchange your flowers for a delay book.The lower the number in the book,the faster you choosing the spell.

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