Mark: For early armor penetration
Seal: For better durability
Glyph: For better durability
Quintessence: For early armor penetration

Doran's Shield: Good starting item for great health and armor and health regen.
Boots of Speed: good item to buy second
Kindlegem: good item for healt and cd
Mercury's Treads: My favorite shoes, good for magic resist and tenacity
Spirit Visage: good item for ur passive and later life steal
The Black Cleaver: Gives u good attack speed, AD ad armor penetration
Madred's Bloodrazor: Good item vs big health enemies and gives lots of attack speed and dps, also gives AD and little armor
Frozen Mallet: Gives good health and DMG to w:skill, and little AD, also reduces enemies movement speed with basic attacks
Blood Thirster: Gives u much AD and life steal

Pros:-Good DPS
-Great DMG
-Can solo Baron
-Penta build

Cons:-Low mana

If u jungle with Volibear use W:skill when enemy have low health, for better DMG.
Its good to use W:skill to enemy champ. too when he/she have low healt

After using ultimate and u have already killed enemies, use last of ur ult to minions.

Ty for lurking my build ^^ and remember to vote (not Spudef >:D) and write comments if u have to ask something.