“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.”
“Recommended: Standard Runes & Ignite
Tips: Passive shield his Q poke. Always block his Brittle AA with your W. E him to prevent his R2. Don't let your E get interrupted by his E or R.”
“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).
“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.”
“In this matchup you should try to remove is bone plating and go for extended trades (keep your E to dodge his W), try to crash 3rd wave on his tower, so you can recall without losing cs, then you freeze lane and bully him every time he tries to cs.”
“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.”
“Ornn is pretty tough because of his strong poke, engage, and sustain. You can't poke him most of the time because of Thresh's low range and Ornn's low Q CD and high damage. His ult is good but you can deny most his engage with your ult and flay. ”
“Build Last Whisper and Black Cleaver early.
Renekton's ability to dish out so much damage and sustain in lane works against Ornn's play style. It's paramount that you avoid his knock up. His W flame breath is a bit harder but the main thing is to avoid the very last tick since that debuffs you. If he misses his Q-E combo, you can safely extend the fight and zone him from the wave. Use your dash wisely and this isn't a hard lane.”
“Ornn is an annoying tank matchup. His short trades are immensely good. Overall, you can somewhat win all ins early IF you make sure he doesn't proc his brittle on you. This requires you to sidestep his flame breath. If it hits you with the last tick, just walk away. He will chunk you out SO hard with that 1 auto. Rylais, Lyandries and Mercurial Treads are good into him. Level 6 you straight up win though. Just fight him and Ult him right after he Ults, because his ult won't be there in Death Realm, letting you freely kill him. Be aggressive but don't be too risky. He will blow you up if you underestimate him.”
“TL;DR - SKILL MATCHUP IN YOUR FAVOR. 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.”