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 Sion crit. build is very good to jungle,kill champions or teamfights.
The first item is good to take the firstblood with a good partner on youre side.
the movement speed is very good to kill champions who run away. Occult is a important item for sion because you can get 100 attack damge and more movement speed (20 stacks). If you are a good player with sion you can crit with 1000 damage with one hit and youÃ�Â´ve got a haste of 1.4 hits per seconde.