This is my very first guide about my main champion Zac. Pls consider that i am at plat league so on higher leagues or elos this might not work. You can always make changes according to your playing style. I am just loving the sound of "An enemy has disconneced" sound so instead of farming i am ganking as i can. I am not gonna explain items or runes like "Mercury boots is good for enemy ap champs bc it gives magic resist..." i find it kinda stupid.Sorry for my bed englando if you tell me my mistakes i will be gald to fix them. Enjoy!

Save your E at early game as you can because it has high CD and sometimes it can make you wait for ganks.
Be sure of enemy wasted their cc before ganks. You can trust your passive ability to dive under the towers in early game especially if your top lane has Teleport they can Tp to your passive chunks to keep it alive.
You can find it easier to use Q on minions first then attack to enemy heroes to pull them.
After using Q on enemy champs you can pull them with your basic attack to ANYTHING (tower,wards,zyra's flowers,Yorick's wall,Jungle plants etc.)

Pros

Tanky
Can do 1v1 after spirit visage at early game
Pretty high mobility
Good at counter ganks
No risk at all if you know how to gank
Aoe CC and damage
Jungle sweeper

Cons

If your top has no tp you can flame him and get reports for it but i will understand.
Bad at 1v1.
There are some cancer champs can kill your 4 chunks of your passive with a single skill.
Green (I hate green)
Seriously buy a skin he has some cool skins.