Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is how I like to picture a viking, and be as ruthless and fearless as a viking should be. Olaf is naturally slow so in order for you to catch up to people that are usually running from you i like to get a couple of movement items. Now im sure that in every Olaf build there is a Frozen mallet and for good reason when u do catch up to people they wont be going far.
I hope you try this build out and I will be updating this build whenever I get the chance. please comment on this build after you have tried it and let me know your opinion on it and if there is anything that would work better. Have fun and Good luck.