Can anyone help me use zed? I bought him but he is hard to play.
Any useful information will be appricated and thank u.

Take armor pen reds and quints, flat armor yellows and per level MR blues.
Take 21/9/0 masteries - be sure to take Havoc(3) and Executioner - its important

Build a Brutalizer first, a Bloodthirster second, a Last Whisper third

Don't harrass with just your Q, you will run out of energy too fast.
Harrass with a shadow AND a Q, you will get an energy return.

Personally, I max R>Q>W>E. Most other people take more E but I'd rather have the W passive.

If you ult on somebody, remember that you have 3 seconds to deal as much damage before the Mark explodes and deals another +50% damage to him. So, start R then E then Q then autoattack. The amount of damage this deals should be climbing all game long.

Don't be afraid to steal blue or ask for it from your mid, it really helps.