I was glad when I saw a new Zac-guide coming out. Then I saw it.

Tank Build is ok, damage build isn't.

You lack coding.

It was not great, but it was ok...until I noticed:

OMGWTFISUPWITHU? You just copied my guides' rune section - word by word, even the black "Free line"! What the ****, I mean WHAT THE ****!!! Why do you even make a guide when all you do is copypasting from other guides??

Sry, but I'm going to downvote this. Hoping for improvement, though, it's not all lost yet ;).

Doran's Shield + Health Potion is a decent start option, too so you might think of adding it. If you want to buy Sunfire Aegis you should rush it because it falls of late game so against AD you can go for Sunfire Aegis and against AP for Spirit Visage early on. For damage you can choose an early Haunting Guise (against AD).
Furthermore Unyielding and Block are really strong early game Masteries you probably can select.

I you want to visualize your guide you can write for example [[Let's Bounce]] to get this Let's bounce when you mention it in the guide. Besides, you can look up the Mobafire coding guide.. :)

I would just like to say the stats are all wrong and hopefully they will update soon :D

Rylai's Scepter is pretty bad on Zac, as all of his skills are AOE, and all but Unstable Matter already have CC attached to them.

Uhh yeah Liandry's is on the build but I personally find Rylai's good for Zac when you initiate a fight. But its up to personal preference
Thanks for the feed back :)

Rylai's Crystal Scepter is not very good on Zac, because only his Unstable Matter proc's the slow efficiently. The stats are quite ok, but there are better Items for Zac if you want offense. ( Abyssal Mask Liandry's Torment)