Hello all, welcome to the guide on the blobby glob of joy Zac. This guide features both on offensive and defensive ways of playing Zac. When I started League of Legends I could not take my eyes of this champion. I kept wondering how to play him. Sure enough, the weekly rotation came up and Zac was one of them. When I tried him out I immediately knew that this was my guy and will be my main. So feel free to use this guide if you are going to play Zac in the Rift. Good luck to all you summoners :D. Feel free to also comment anything to help me improve this guide.

CC = Crowd Control
AP = Ability Power
AD = Attack Damage
Drag = Dragon
Ulti = Ultimate
CD = Cooldown
MS = Movement Speed (Usually means missing in-game)

Pros + Has amazing gank potential + Very Tanky compared to most junglers + Can heal easily due to his blobs (It heals for 4% MAX health) + His Unstable Matter does per cent MAX health damage + All his attacks are AoE (Area of effect) + Very good at disrupting the enemy team + He is manaless + Has a passive like Anivia which can be very useful. + Probably has the best gank tool since he can appear and strike from the fog of war without warning

Cons - Quite squishy early game - Almost always relies on his Elastic Slingshot which can be disrupted - Bloblets can be crushed on - His reviving bloblets are heavily affected by AoE attacks and Smite - His Let's Bounce is not the best ultimate out there - Probably needs taking time to get used to - Low base Movement speed - Stretching Strike is pretty useless most of the time

Recovery. Unyielding grants you the extra tankiness from both AD and AP casters. Runic armor is excellent when combined with Zac's blob healing passive, Veteran Scars is viable as well though I prefer the extra heal over the extra health. Most champions would take Insight just from the summoner spells CD, it is no different for Zac. Although Perseverance is also optional if you think that your Warmog's passive isn't enough. Legendary Guardian, similar with Unyielding provides the extra tank stats for Zac. Strength of the Ages is the "Keystone" which suits Zac the best. Given that he is health based, this would provide more to further increase his bulk. (as if he isn't bulk enough already)
Sorcery because Zac is AP after all. Savagery for slightly faster clears, unless you want the extra MS then I suggest you go for Wanderer. Runic Affinity because he is a jungler, duh. The reason why I play 6-6 instead of all 12 in one tree is because for Zac, it seems pointless, Runic affinity would be much more sufficient than Oppressor and anything below Runic Affinity in the Cunning tree is pointless for Zac.

I take 9 Marks of Magic Penetration for the extra damaging capabilities he has. Sure, he may not have a lot of that ability power but I can assure you it does deal a small punch which can make a difference. Alternatively, you could go with 9 Marks of Armor for the extra sustainability. The 9 seals of armor are pretty much self-explanatory. You could go for Seals of Health , Scaling Health or Scaling Armor but I would not recommend it since Zac already has so much health. It is best to give him more tanky capabilites. I take 6 Glyphs of Scaling Magic Resist since he probably will not need that much magic resistance and Spirit Visage already provides a bit of magic resistance. I take 3 additional Glyphs of Scaling Cooldown Reduction since his Elastic Slingshot and Let's Bounce! have pretty hefty cooldowns. Lastly I go for full Quintessence of Health to make him a bit more beefy, also good since it replaces the Veteran's Scars Mastery . I normally swap one out with a Quintessence of Ability Power just to get a little more damage.

Smite Flash

This is essential because you are jungling and you would not jungle if you do not have this. This is probably the only spell which is chosen almost all the time. I use it to either secure easy kills or to escape great danger.