As all good supports take ignite to help mitigate out any life gain such as heal or and lifesteal. Also it's good for more all in as Ornn will be the engagement in this lane.

This should be just the same as Ornn top as you will be using the abilities just the same. Engage the ADC and try to lock them down as much as possible use all the CC to make sure then are dead from your ADC before they even have chance to kill yours. Brittle on the W will extend CC on the targets if used before auto attacking them. This can be useful if you are close enough to engage with Q,W, then E into the pillar to extend the knockup because if the Brittle proc, auto attack when they come down and that should be enough CC and damage for your ADC to finish them off. More than often though The combo will be Q, into E knockup on the pillar, W, Auto. ORNN MUST coordinate with the ADC. He can not finish off the enemy without follow up damage.

Alright before you start questioning my sanity hear me out. Ornn probably has the most CC in the game. So why would I run Glacial Augment? well it gives a lot of room for error, Miss your Q and they run from the pillar? Righteous Glory Chase, freeze ray and get some forgiveness CC for missing your combo. It allows for a lot of room of error for Ornn, which as him abilities can be predictable is fairly easy to miss. But if you're a sane person the other Rune Page might be more your style.

Grasp of the Undying gives that much more damage in the combo when you Q,E,W Auto Attack. An argument can be made for Demolish but with Ornn's high amount of Health, inability to heal his ADC and his mass amounts of CC Font of Life can give his ADC more health gain when targeting the same target. Bone Plating is good for laning phase and gives that extra bit of sustainability. Conditioning can be really good to stack on to Ornn's 10% extra Armor and MR from his passive but Ornn's late game is already strong enough with AOE CC and improving his allies items. Overgrowth is just solid on Ornn as I am not a fan of Unflinching but a very good argument could be made for Unflinching over Overgrowth. Ornn's long Cooldowns need some help so Cosmic Insight is a must. Because Ornn can build items in lane the only thing pulling him back is Mana and Health so Biscuits are great fro increasing max mana early game and keeping him in lane.

With Ornn's new update removing his Shield from his W and increasing the damage Brittle does He's great of engaging the ADC and keeping them CCed long enough for your own ADC to kill them before the enemy has a chance to fight back. Ornn MUST need a confident ADC or communication with them for them to go in together because as Ornn will do a lot of damage he will not be able to finish off the ADC alone. So having that ADC to do that last bit of damage is a must. Plus as a support you want to give the kills to your ADC so they can carry the game. Any questions, comments, concerns? comment down below and please be aware this is my first time making a guide for a Champion in a strange position so nothing is final or absolute, I simply don't have enough match up information to make a very optimized and accurate guide but I hope this will help you have a bit of fun as Ornn.