hello this is my first build and I hope you find it helpful.

I like to take ignite and teleport but not every one likes this.

(what you can take instead)

exhaust

flash

clairvoyance

ghost.

(what not to take)

heal

revive

clarity

fortify

rally.

My runes are kinda random because i use them for most dps champions but they still work for skarner.

(Early game) for items I all ways go sapphire crystal and 2 health potions, then when i get enough gold i recall back and buy a tear of the goddess and teleport back. next I buy berserker's grieves
and a phage followed buy a sheen and then trinity force.

(Mid game) I buy a malady and either a wit's end or a madreds-bloodrazer depending on the other team.

(late game) I buy a manamune and then a frozen heart for the armor and mana.

I usually go bottom or top because skarner isn't very good at soloing.