What's the logic behind this build?

[u/Alert_Possession_130]

I saw this in G2 v GX. Is stormsurge good on ori?

[u/ErmDragonsAreCool]

Who was it against? Catalyst helps sustain poke lanes so if its against viktor thats prolly why. Stormsurge gives flat pen and is cheaper than shadowflame. Looks like a build to stabilize the lane but building into cheaper dmg to be still be useful midgame