(BEFORE YOU READ THIS GUIDE): Welcome to my first mobafire guide :). I am kinda inexperienced with this kind of thing so please feel free to give me suggestions on the discuss section at the end of the video :) TY!
P.S. I added a TL;DR section so use that if you dont have time or just want to get back to playing!

PASSIVE: CONTEMPT FOR THE WEAK


Zed's basic attacks against targets below half health deal 6 / 8 / 10% of the target's maximum health as bonus magic damage.
This can only happen once every 10 seconds.

PROS: Good for mid game CS, Does Easy Extra damage to champions for poke, Does massive damage early game, and good to do some nice extra damage while using your ult.

CONS: Hard to CS with (if not used correctly), does weak damage early game, isn't reliable for early CS.

RAZOR SHURIKEN


ACTIVE: Zed throws his shurikens forward, dealing physical damage to the first enemy they pass through and 60% damage to enemies after. (LIVING SHADOW IMITATES THIS)

PROS: Good for harassing, Easy to CS with if you are against an opponent with ALOT of poke and harass, your major damage dealer when ulting (make sure to hit at least two of your shurikens during ult).

CONS: Costs alot of energy (Use it wisely!), hard to poke once you use it

LIVING SHADOW

PASSIVE: Zed's bonus attack damage is increased by a percentage.

ACTIVE: Zed's shadow dashes forward, remaining in place for 4 seconds. Reactivating Living Shadow will cause Zed to swap places with this shadow.

PROS: Fun/easy to juke with, good escaping/gap closer
CONS: High cooldown

SHADOW SLASH

ACTIVE: Zed spins his blades, creating a burst of shadow energy and dealing physical damage to nearby enemies. Each enemy champion hit reduces Living Shadow's cooldown by 2 seconds.
(LIVING SHADOW IMITATES THIS)

PROS: Does alot of damage mid-late, second option to max out (you usually max this out if you want to go jungling)

CONS: Very short range

DEATH MARK

ACTIVE: Zed becomes untargetable for 0.75 seconds and dashes behind the target enemy champion. Upon arrival, he marks the target for death, ignores unit collision, and spawns a shadow that lasts for 6 seconds at the cast location. Reactivating Death Mark will cause Zed to swap places with this shadow.
After 3 seconds, Death Mark will trigger, dealing flat physical damage plus a percentage of all physical and magic damage dealt to the marked champion while it was active.

PROS: Makes you untargetable for a moment (you can dodge skills that do massive damage), places you behind the enemy so you can chase from there, able to still do damage after you swap back to your shadow (q,e on the enemy), gives you extra style points if you leave the enemy to die to the mark.

Q: Throws shurikens that do alot of damage mid-late game
W: Places a shadow on a target location which you can switch places with and that shadow imitates your abilities
E: Spins like a ballerina and does damage to targets around him
R: Places a mark on target champion that does a percentage of damage dealt after three seconds.