Hello guys! Its Misterfirstblood with a new ADC Champion Guide.
It's been a while since i released my last one because I took a break with League of Legends and Content Creation. But now I'm back and more hyped than ever to play some League and let you know about the Experiences i've made.

++ Super fast movement speed
+ Very good at kiting opponents
+ Mixed Damage
+ Midgame monster
+ One of the best dashes in the game
+ AoE damage

- Weak Early
- Not the strongest Late game
- Vulnerable to on Click hard CC
- Not good at melting tanks
- You can play around Zeri by standing behind minions (her auto attacks are skillshots)

P: Living Battery
Zeri Shields herself for 60% of the damage she deals to enemy Shields and gains 10% Move Speed for 3 seconds whenever she receives a Shield.

Q: Burst Fire

Range: 825
Cooldown: 1.52
Passive: Zeri's Attacks are treated as Abilities and can be charged up by moving and casting this ability. Uncharged Attacks deal (10-25^ + 3% AP) magic damage and consume some charge. A fully charged Attack deals (90-200^ +90% AP) + (3%-15%^) max Health and consumes all charge.
Additionally Zeri executes Targets below 60-150 Health.

Active: This Ability is treated as an Attack. Zeri fires a burst of 7 rounds that deals 8/11/14/17/20 (+110/115/120/125/130% AD) physical damage to the first enemy hit.

Passive damage applies Ability effects and cannot crit or apply on-hit effects

Active damage can crit, apply on-hit effects once per target, and hit anything that an Attack can. The Cooldown and cast time scale down with Attack Speed (max 1.5 attacks per second). 60% of excess Attack Speed is converted into Attack Damage.

W: Ultrashock Laser

Range: 1200 / 1500
Cooldown: 12/11/10/9/8
Cost: 50 / 60 / 70 / 80 / 90
Zeri fires an electric pulse that deals 10/45/80/115/150 (+1.5 of attack damage) (+70% of ability power) magic damage and Slows the first enemy hit by 30/35/40/45/50% for 1/1.25/1.5/1.75/2 seconds.

If the pulse hits terrain, it expands into a laser that applies the effects in an area and lands an critical hit.

E: Spark Surge

Range: 300
Cooldown: 22/ 20.5 / 19 / 17.5 / 16
Cost: 80
Zeri dashes a short distance and vaults over any terrain she touches, greatly extending the dash range. Her next 3 shots of Burst Fire pierce, dealing 80/85/90/95/100% damage to enemies after the first.

Hitting a champion with an Attack or Ability reduces this Ability's cooldown by 0.5 seconds but critical strikes will reduce it by 1.5 seconds instead

R: Lightning Crash

Range: 825
Cooldown: 100/ 85 / 70
Cost: 100
Zeri discharges a nova of electricity, dealing 150/250/350 (+ 80% bonus AD) (+ 80% AP) magic damage to nearby enemies and gaining 4 stacks (8 stacks when critical striking) of Overcharge for each champion hit for 6 seconds. Each stack grants 1% Move Speed. Hitting an enemy champion with an Attack or Ability adds a stack of Overcharge and refreshes its duration by 2 seconds.

While Overcharged Zeri also gains 30% Attack Speed, 10/15/20 (+ 15% AP) magic damage On-Hit, and Burst Fire becomes a faster triple shot that chains the bonus magic damage and 25% AD physical damage to nearby enemies.

Since Burst Fire is basically your auto attack and your role as an adc player is to use your auto attack all game you pretty much need to maximize this ability very first.
Mobility Spells are most likely the second spell you want to maximize and since it gives you not only wave clear but also a huge damage buff, you want to use it as often as possible and to decrease its rather long cooldown i recommend to max out Spark Surge second and Ultrashock Laser last.

Even tho Ultrashock Laser deals a ton of damage at level 1 the other options are just more important at lower levels in the game.

Statikk Shiv into Runaan's Hurricane seems to be the best 2 item start on zeri nowadays. While Navori Flickerblade and regular crit items like Infinity Edge and Phantom Dancer arent bad either, you should prioritize the waveclear and AoE items before building those.
Berserker's Greaves are the obvious choice when it comes to boots.

To round your build up you can build items like Immortal Shieldbow Mercurial Scimitar or Bloodthirster

Fleet Footwork is the best of the available runes currently. With your all-in based playstyle Triumph and Last Stand are also pretty good choices. Its personal preference if you like Legend: Bloodline or Legend: Alacrity more in this slot.

but whats not a preference thing is your secondary tree choice.
Resolve is the best for all-in based champions like zeri.
Overgrowth and Conditioning offer a ton of survivability and really can change things up.

- Since your auto attacks are skillshots, good opponents might just stay behind minions and try to outplay you (it's the same as with Graves so keep that in mind and kill the minions before you try to engage or position yourself so that you can attack them for free
- Rift Scuttler will always be shielded so if you walk from bottom to mid lane or vice versa you can attack him and get a free shield + movement speed buff by doing so
- You can bind your Q ability with your mouse wheel and use it to auto attack if you feel confused when getting started with Zeri. It totally helped me out
- You can attack Baron's or Dragons' from outside the pit if you position correctly
- You can clear wards very fast by using Q and your Normal auto attack right after pressing Q
- When playing on blue side you can walk towards the rift and use your W ability through the wall to either push or poke your enemies
- When you are under a tower you can easily use your W to shoot through it and deal a lot of damage with an amazing range
- In teamfights it can be recommended to attack tanks instead of squishy targets to steal their shields and increase your own survivability

Because you will benefit from gaining shields its not nessesary but nice to have either a support on your side, that can give you shields, or an opponent with shields that you can steal using your passive, because you will gain movement speed by doing so.
Besides that its pretty recommend to play with either a very mobile support like Rakan because most of the enchanters and tanks might not be able to keep up your pace when you get tons of movement speed, or ones with lots of range that can buff you up and let you go ( Lulu is a good example, but Nami can do the job aswell)

Thank you for paying attention to my guide!
In my opinion Zeri is one of the most fun additions to the ADC Meta and by far my most played champion currently. I hope you enjoy her as well as I do.

If you found any mistakes please let me know, english is just my second language and i really tried my best here.