The purpose of this Team Build is to empower Olaf the Jungler aka Thor to be as powerful as possible.

While Olaf builds the items that directly affect him, other Champions build Aura items to empower Olaf. Xin Zhao aka Hogun builds Stark's Fervor to enable Olaf to buff his Lifesteal even further. Gragas aka Volstagg builds Aegis of the Legion to enable Olaf to buff his tankiness even further. Abyssal Scepter will also help out.

Xin Zhao aka Hogun will solo mid.
Nidalee aka Sif will solo top.
Master Yi aka Fandral and Gragas aka Volstagg will duo bottom.
Olaf aka Thor will jungle.

Fandral's Biography

Master Yi aka Fandral is the Master Swordsman of the Warrior's Three.

Hogun's Biography

Xin Zhao aka Hogun has an extended life-span with some skill in the art of Healing/Lifestealing to compliment that.

Volstagg's Biography

Gragas aka Volstagg has an even longer life-span than Hogun and is the Master Tank of the Warrior's Three with his superhuman strength and durability.

Sif's Biography

Sif aka Nidalee is an overall skilled warrior who is a good friend of Thor as she fights along side him and the Warrior's Three.

Thor's Biography

Thor aka Olaf is the Leader and the God of Thunder.