Hello everyone this is my first guide i make.

I hope it will help you on your way out of low elo.

First we will talk about the runes.
You go Corrupting Potion because of time warp tonic, you get such hard sustain and survibility with it and the cookie buff gives you the cookies much faster so a bigger snowball is guranteed.

Why you should take Grasp or Conquer?
Grasp is good for playing save and when you predict that you will lose the lane or fights. Take conquer if its against riven for example or against camille irela etc.

shield bash is only a option if you dont like the splitpush playstyle from me.

demolish is rly good for late game splitpush even with tp and trinity.

Bone plating is obviously for fights/duells on toplane, take Second Wind if you play against teemo or smth equal anoyying.

Overgrowth lets you scale good in late, and the other 2 options are **** on poppy.

You take double AD and one time Armor in the Stat Shards, because of poppys good ad scaling so you can clear minions better/last hit better and your q makes like 20 dmg more dmg.

Soooo we talked about the Runes now, but whats with the items?

First you start corrupting potion like i said, after the first back you go bamis cinder for wave clear and a bit extra dmg in fights, if you play against ranged toplaners go sheen first and poke them down with your passive (just q and aa them).

You normally try to finish your sunfire cape first, but if you snowball like 2/0 3/0 etc. you can go trinity force first (its even your powerspike in the build).

When you go sunfire first go bamis cinder first and when you go trinity first go sheen into the attackspeed item,because your extra attackspeed makes it easier to last hit, to proc conquer or grasp and you can duell better against your opponent.

Now to the boots.
You go ninja tabi if they have 2 "adcs or more" like fiora and vayne or smth with "adcs" i also mean smth on toplane like fiora riven camille or smth or kindred in the jungler or kayn smth with too heaver dmg for you to handle in early game.
You go mercurys boots if you need mr early, like kennen toplane, teemo toplane etc. or they have leona or smth like her, a cc bot or in gernal heavy cc.

now why i prioritize these items in my build.
Many midlaners have ap(Supports too and sometimes toplaner and jungler too), so you RLY RLY need some mr at 3rd item so you go adaptive helmet, because all other mr items are ****.

And at the last two items you go steraks or gargoyles (you should go both, maybe change gargoyles to zz'rot portal)because you need still some ap and armor, because adcs are useless until they hit 40 min mark, so you need some more armor before they hit it, and mr is always good against mages.
Steraks is good because of the shield, it also gives hp which scales good with your passive shield and demolish/shieldbash and the most important point is, you dont die so fast with much hp. :)

I will add some combos and how you need to fight some matchups, but this will take a long time so it will come in the future and not now, if you have any help for me to make this guide better then tell it me pls. :)

And get free lp outthere in the rift