Overview on my items for Volibear
Volibear has a very specific set of items that make him a bigger threat every time you complete a full item. My first concern for all Volibear players is that they do not build AD items unless it's Blade of the Ruined King, BC, Frozen Mallet, Wriggle's Lantern, or Dorans Blade. My reasoning for this is that Volibear has 0 scaling for AD and should not be built like he's Jarvan IV or Darius. Volibear's skill set includes many things that work well with Attack Speed and On hit effect items. His R and his W are the whole reasons Volibear builds attack speed and not attack damage which I will go more in depth later in the guide.
I also do not build straight tank Volibear, I've done it a couple times and it's not quite on par with the Volibear build I use. This is because Volibear with a straight tank build is reliant on W to do all your damage. You are not Darius with a refreshing skill, so saving your bite until the end will get the kill but then your damage is gone, also you can't use it early or else it does very minimum damage. Tank Volibear has very low attack speed meaning his large base damage on his R is not being taken advantage of.
Typical starting items on most top lanes. Go boots and 3 potions in a normal situation, or if they are playing someone AP, use your judgment to decide whether you feel you may be getting harassed a lot, or you will go more aggressive. I typically pick boots 3 in almost all situations unless I am fighting someone that is purely AD (IE: Renekton, Fiora) in which I go cloth armor and 5 potions. However, no matter make sure you farm to the best of your ability and use potions when necessary. Potions are mandatory for any lane, as they keep you sustained for better trades and may even save your life in a 1v1 situation. A new set you can get for Voli top is if you choose to go Crystalline Flask. This is good if you want extra sustain, but most importantly you get to start a ward and with that you can be more aware of early ganks. I don't go Crystalline Flask unless I'm really worried about those early ganks.
First Back Objectives
After you go back for your first time, you hopefully have 1) Gotten a kill from a 1v1 or jungler gank. 2) Farmed up around 1000 gold. Now remember this; WARDS>ITEMS>POTIONS. This is because wards save lives much better than an extra item will ever do for you. Warding your lane is crucial because if Volibear is undisturbed by the enemy jungle, you will quickly become a threat, and with the extra insurance that you won't die, you are well on your way to being a successful bear.
Ok now that Warmog's is OP as hell it's actually good to go Warmog's early. Early health was never bad it was just never AS good. Now that health is really good when it's stacked, it's Volibears time to shine. Get an early Warmog's GG your unkillable and still hit a shit ton of damage, it's only a matter of time before people find this out lol. But yah, getting an early Giant's Belt is great now, sustain, bite damage, tankiness. Love it!
As far as boots go choosing between Merc and Ninja Tabi should be generally easy. If they are very AD heavy go tabi, CC/AP heavy go Merc treads. Or go Tabi in lane and late game get Merc treads, it all depends on the situation/enemy champions. As for enchantments, go with Homeguard or Furor. Homeguard to get back to teamfights faster, Furor for stick power.
Now let's discuss the reasons why I choose these items for Volibear's core. Starting with Spirit Visage, this item benefits Volibear in every way damage wise and survival wise. The health increases your execution damage which is crucial in order to finish off an enemy carry or trading better in lane, especially if the enemy lane is AP. The passive of Spirit Visage will make your passive heal a significant amount more (more health = more passive heal), which means you will be a bigger threat because you are much much harder to kill. Going onto Wit's End; this item also greatly benefits Volibear in damage and in being a tank. Volibear should not be focusing on getting AD as I've said before. With Wit's End, his R damage is increased as more auto attacks are being pulled off with more attack speed. Attack speed items in general work very well with Volibear because of his constant steroid from W stacks, making his R a huge threat. Blade of the Ruined King is by far Volibear's best dps item. The attack speed, lifesteal, passive, active are all fantastic. I pretty much rush BOTRK every single game because it's so good for trades. A very important thing to know is that try and get at least one tanky item before you go into teamfights. If you just have BOTRK and nothing else you will get dunked.
More Core Item
This is now an absolute must. I have recently come to a liking of this item just because it provides a great amount of tankiness with low cost and a bit of damage. The health is great: passive and W get improved. The armor is great: let's you go even more balls deep once you get GA. The damage is great: it really doesn't seem like much but it stacks up when you stick onto an AD carry. Overall, fantastic item on him to replace Ionic Spark, especially if the team is AD heavy.
Yup, this item is truly ridiculous now. Build it on any tank and become an unkillable monster. Build this on Volibear: become an unkillable monster AND have massive damage. So yah, get this, get Sunfire Cape then get the DPS items. Seriously, there isn't a situation where NOT building Warmog's is suggested. GET THIS ITEM AND YOU WILL TAKE A DUMP ON THEM! (this is kind of old when Warmog was OP. Still a good item though)
Volibear's end game item should almost always be a form of tankiness. I specifically like to choose Randuin's Omen because of its fantastic active when you chase carries and the amount of armor it gives you for being the teams tank. I would sometimes get a Warmog's Armor depending on if the team I face is not heavy in physical damage. On top of that Warmog's Armor gives 1000+ health for Volibear's W and passive to benefit from. Last, you may want to pick up a Shurelia's Reverie if your team desperately needs an initiator. The Shurelia's active along with your Q make you an absolute speed demon, almost ensuring an initiating flip on whoever you aim for. Frozen Mallet can also be a good choice but I typically avoid it because you get slow from your E anyway, but if you are going for early game ganks it might be better off to go phage into FM. Plus, the health gives a large bonus to passive and W.
Guardian Angel is a very significant late game item as in synchronizes EXTREMELY well with your passive. What happens is when you die, your passive healing still goes toward your health pool and you actually get reborn with however much that passive gave you. Not only this but when you do respawn with that health, it just makes you a target threat because your build is built for damage.