Not Updated For Current Season
Berserker Rage : (passiv): For each 1% of health missing, Olaf's attack speed is increased by 1%.
Undertow : Damage: 65/110/165/200/245 + 30% of Attack Damage
Slow: 24 / 28 / 32 / 36 / 40 %
Vicious Strikes : Damage: 12/18/24/30/36 (+ 0.4/0.7/1/1.3/1.6% of Max Hp)
Lifesteal: 9/12/15/18/21% Spellvamp: 9/12/15/18/21% Last 6 seconds
Reckless Swing : Damage dealt: 100/160/220/280/340
Damage taken: 40/64/88/112/136
Ragnarok(Ulti) : Immune to disables, Flat damage absorption:25/45/65
Passiv : armor penetration 10/20/30
Ghost is really useful for Olaf, u can easy catch some 1 or run away with ulty on.
Exhaust same as ghost slow some 1 to finish him or slow to run away.