READ DESCRIPTION FOR GUIDE: HOW TO GET ALL 3 SPELLS!
Destruction have 3 master spells Fire Storm, Blizzard, and Lightning Storm.
To get them u need to lvl up ur Destruction skill to lvl 100 then go to the Collage of Winterhold and take a Quest from Faralda. After that you will need to go to:
First - travel to Windward Ruins, south-west of Dawnstar. In the ruins there will be a pedestal, when activated the book will place itself on the stand. Casting a Fire spell at the pedestal (not the book) will trigger another page of text to appear after picking the book back up. This time giving slightly less vague directions to ruins in the south of Skyrim near the Throat of the World.
Second - travel to North Skybound Watch, on the south-western edge of the Throat of the World south-east of Riverwood. If you have not already discovered the location, it is easiet to get there by starting at Helgen and going north. After placing the book, this time cast an ice spell at the pedestal before picking the book up. The next page directs you to a location near Karthspire.
And Third - Third, travel to Four Skull Lookout, east of Markarth and just south of Karthwasten and north of Sky Haven Temple. This time place the book and cast a lightning spell at the pedestal.
Finally, take the book back and then go to your inventory and read it. This awards you with the Destruction spell Firestorm and more text in the book, this time a grim-sounding message from Shalidor
After u finish those Quests u get Fire Storm for free, The other 2 u need to buy from Faralda for about 3k gold. Hope you like this and SUBSCRIBE me :)