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 build is hilarious and will frustrate the hell out of the other team. Doran's ring is great early on because you can spam Deaths Caress often. The best strategy is to hide in the bush and charge the shield. Once it can be set off step out and explode! It can also be used to counter annoying harassers early. Two rod of ages early are great because sion is always mana deficient and the ap boosts the shield and stun. Abyssal Scepter makes your skills even more dirty and protects from other casters. Void staff again helps the skills and lastly the sunfire or zonyas are your choice for final items. Zonyas if you feel you have plenty of health are ready to tank anything or sunfire if their DPS is messing you up and you just wanna burn people! The two spells are your choice. Ghost is fun and is great for tower diving and blowing up on a weak champion and cleanse is great because as a tank people will cast a bunch of stuff on you. Also the boots can be changed out for merc treads or tabi depending on their main damage.