Talk:Olaf/@comment-87.202.42.10-20120828143902/@comment-109.217.242.126-20120905074933

or simply he  used it once at level 3  E,  leveled, used level 4 : 500 damage and you had a 10% more damage on you from some debuff : 550 , remember on death recap it  recaps the source of damage , but it doesn't mean it was used only once.