“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.”
“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.”
“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 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.”
“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.”
“This matchup can be a little bit difficult, but the main points are to only use your Q stun after he's used his W (Bellow's breath) as it makes him unbreakable. You can avoid the knock-up from his Ult by casting yours after he headbutts the ram towards you. Ornn actually deals a lot of mixed damage, so building health is the best thing to do, although his W deals % max health magic damage.”
“Take Conqueror or Grasp of the Undying. W his Brittle proc to deny a lot of damage. At level 6 Use your ult when he's about to headbutt the ram with his ult to stop it. You can't really kill him 1v1 ever. You can farm out the lane then use him as a meat bomb later into the game. ”
“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 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 BORK > Kraken Slayer and you'll dominate him entirely!”
“It is easier to beat Ornn now as you can get away with rushing phage into boots, then going Blade into this matchup. Make sure you always pull his E as he can chain cc you too death. Try and only fight him at level 6 until 13 and then at level 16.”