Talk:Kassadin/@comment-95.180.16.189-20120630223217/@comment-88.186.19.90-20120701063629

He is 100% right, learn maths: it's the total mana cost of using riftwalk n times without waiting for stack cooldown. The first time you spend a total of 100 mana. The second time the previous 100 plus 200 (100+100) for a total of 300. The third time, the previous 300 plus 300 (100+100*2) for a total of 600... etc