Foreword [Just a Build]
W***up... here is my preliminary build for Volibear. Since Mobafire has yet to update their website, this build will have to sit with no champion. Thus I will notate the build here.
Build: Mercury's Treads, The Black Cleaver, Wit's End, Frozen Mallet/ Warmog's Armor, Atma's Impaler,( Spirit Visage) Guardian Angel Randuin's Omen
Order: Boots of Speed+3x Health Potion-> Heart of Gold/ Kindlegem/ Phage-> B. F. Sword+ Dagger/ Recurve Bow-> The Black Cleaver+ Wit's End-> Frozen Mallet+ Atma's Impaler
Build: Mercury's Treads, The Black Cleaver, Wit's End, Entropy, Atma's Impaler, Randuin's Omen
As of now, my only concern of this build is: low survivability during early game, and cost which seems quite high. For the low survivability early game, I believe that can be remedied with runes.