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.
Ok so I have had a lot of success with this build and I thought I should share it with fellow Zilean players.
The masteries i choose are to basically give a decent amount of cool down reduction and a bit of magic penetration. This goes well with the items which i will get to, because it makes for high magic penetration when built up to the second void staff.
I choose these spells because if you revive yourself it is not uncommon for adept players to stand over your body waiting for you to spring up. With flash you can use it right away, caste haste on yourself, and make an escape. Clarity is to help keep you in your lane to not miss experience and keep harrasing your enemy with bombs
now with this im not sure exactly what I do but essentially it is this.
rewind (double bomb every chance possible)
then max out bomb with first priority, rewind second, and time warp third.Obviously chronoshift when available
I use all AP per lvl runes maxing out his bomb damage. With this build i can kill squishies from full health with a double bomb
Now the items are important in sequence. First Mejias Soulstealer to get that AP up and hopefully later some cool down reduction. Then the boots for speed. Next is archmages staff for some AP as well as mana. Then I get a void staff so i have almost high% magic penatration because by this time people get wise to the bombs. Then an abyssal scepter and last I get Zhonyas Ring to get the final boost to bomb damage.
I hope you like this build, please try it before you rate it, and constructive criticism is always appreciated. Thanks!