“Ornn is a champion that is CC heavy and also relatively tanky. He still deals a ton of damage, however, I would suggest a Ghost and PTA play-style against him, mostly due to his constant slows, he needs to be kited. You can run him down if he misses his stun. Avoid terrain and his pillar or you'll be CC'd and clapped hard. He can miss his ultimate, but it's up to you to juke him out, by pathing a specific way and then immediately turning the opposite way when he has sent out his (R) back towards you. If you don't dodge this, the CC is going to mess you up if you decide either to chase him or run away. He farms with (Q).
“Gigantic meatball if you can dodge his knockups. Try not to stand near walls and dodge his pillar that he sends out. Recommended to rush a Blade of the Ruined King against him.”
“TL;DR - EASY LANE. DON’T EAT FREE BRITTLE AUTOS. KEEP TRADES SHORT LEVEL 1-2(A SINGLE Q) AND LEVEL 3, TAKE CONTROL OF THE LANE. CLEAVER IF YOU FIND IT DIFFICULT TO PUNCH THROUGH HIS ARMOUR/IF YOU ARE BEHIND. CONQUEROR RECOMMENDED.
Ornn is a somewhat difficult matchup because of how much damage he does in trades. He appears to be the average, easy to beat tank but in actuality, he is a lot more dangerous if you aren’t paying attention. Try to dodge the second part of his fire breath as that is the part that applies his brittle stacks on to you. It should not be too difficult as all you have to do is to move sideways which is not something he can do. This is easier to do with ghost activated. If he does get the second part off on you, then you should not let him activate it by auto attacking you. The combo can take away a third of your health bar and he can run away before you can trade back into him. This is even worse considering how he can buy items that let him sustain in lane. Losing to Ornn is very bad as he snowballs hard and becomes ridiculously tanky because of his passive. Don’t worry though. Aside from his brittle stack autos, nothing else in Ornn’s kit is dangerous in a 1v1. He is just free food if you have your ghost activated, provided you don’t let him land every single bit of CC on you. You can stop him from reactivating his ultimate and knocking you up with an E but you’d probably use your E much earlier in a fight. If he engages with R, chances are he is setting up for a gank which he is very good at doing so try to make sure the lane is frozen on your side of the map. You can also cancel his dash with your E, stopping him from getting away. The general idea is to not take stupid trades Level 1-2 and then try to pressure him into an all in at Level 3, as from that point onward you should easily beat him in all ins, especially with ghost. Conqueror is definitely recommended in this matchup.”
“Honestly Ornn is my permaban champion right now because this matchup is just annoying and boring, He will rush Tabi and bramble/thornmail, so you really can't do much in the early game, go Cull and scale up, if you aren't to far behind you can kill him once you have Black Cleaver and Death's Dance but it will still take quite a bit of time, this is just a scaling matchup but he also buffs up his teamates later so he's a lot better then other tanks, other then that try to help your team out with teleport in this lane and farm up with your Cull. I should note you can sometimes kill him levels 1-3 if he is playing agressive and before he starts to stack armor.”
“Ornn is tricky, but easy to play around. Avoid getting clapped after his W damage (try to avoid that damage too if possible) and be careful not to get knocked up by his Q > E combo. Rush PD.”
“Ornn usually does pretty well in this matchup but he can't kill you unless you make a pretty big mistake. The junglers will be the deciding factor in this lane. Abyssal Mask can be a nice purchase to help you sustain against him in lane. Freezing the wave is a great strategy to beat Ornn, he'll have to walk all the way up to your tower to CS and he'll have no escape if your jungler comes to gank.”
“Get's quite tanky and has somewhat of an advantage in lane with his forging items. After a certain point you won't probably be able to kill him since he get's tanky but you can try to shove him under his tower. Make sure to save your E for his W+auto combo.”
“lvl 2 you win. Look to parry his W auto attack, but be careful as he can hesitate to make you waste parry. You can also look to parry his E charge, or the knock up from his ult. If you know he is going to ult, then save your parry for his ult as it does a lot of damage, applies the knock up auto attack passive, and keeps you vulnerable for an even bigger follow up. Also be careful after he builds bramble.”
“What make Ornn a moderate to somewhat difficult match-up is due to his Living Forge as it deals percent health. Dodge Volcanic Rupture(Q) to prevent getting combo by his Searing Charge(E). Bellows Breath(W) needs to be waited out before you use your Fling(Wait for 1-2 Seconds). Dodge his combos and you will win trades. (Recommended Items: Liandry's Torment) (Mega Adhesive stops him from recasting his Call of the Forge God or Ultimate) (Mega Adhesive stops him from casting Searing Charge) (Fling overrides Searing Charge) (Fling displaces him from recasting Call of the Forge God or Ultimate) (Sustained 1v1 Trades: Even) (Outscaling Edge: Even)”
“Ornn has high CC so he is able to setup ganks for his jungler pretty easily. Try to not stay in his W for too long and avoid getting hit with an auto after you get procced with Brittle cause that will hurt. ”