People say olaf only good solo top. THAT'S NOT TRUE... Olaf is 1 of the best jungler of league of legend. Let discuss him.

Has you seen i take alot of attack penetration to maximum de Q, and W of olaf. For seal I take armor because i like play Olaf tanki... he is so much dangerous. Because of his passive: for each 1% of health lost, Olaf gain 1% in attack speed.

For masteries I'm pushing more offense for make him dealt more damage.

So here just explain you the order:
1. vampiric septer --> wriggle
2. boot --> mercurie tread
3. giant bell --> phage --> Frozen mallet
4. giant bell --> cristal rubis --> regrowth pendant --> warmog
5. cloak of agility --> chain vest --> atma's impaler
6. B.F sword --> vampiric septer --> bloodthirster
7. sell wriglle
8. B.F sword --> dagger --> black cleaver

Pros:
- good jungler
- dealt good damage
- have good life steal skill
- slow really powerful
Cons: hard to play