Ornn

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Support

Forge Fighting

Maximum CDR teamfight engages with [R].

Resolve

Durability and crowd control

Aftershock

After immobilizing an enemy champion gain defenses and later deal a burst of adaptive damage around you.
Font of Life

Impairing the movement of an enemy champion marks them. Your allies heal when attacking champion's you've marked.
Conditioning

After 10 minutes gain 8 Armor and 8 Magic Resist and increase your total Armor and Magic Resist by 5%.
Overgrowth

Every 8 monsters or enemy minions that die near you permanently increases your max health by 0.2%.

Sorcery

+65 health and +10 AP or 6 AD, adaptive

Manaflow Band

Hitting enemy champions with a spell grants maximum mana.

After reaching 250 mana, Manaflow Band restores 1% of your missing mana every 5 seconds.
Transcendence

Gain 10% CDR when you reach level 10. Excess CDR becomes AP or AD, Adaptive.

WhyAftershock

Aftershock on Ornn support is a fantastic tool for lane duels where you're able to get a 2-man knockup with [E] and stay on top of the carry.

The bonus resists allow you to take minimal damage and explosion helps secure the kill.

WhyFont of Life

Ornn can quite easily apply Font to a large number of targets in teamfights with [Q], [E], and [R]. Stacking health will provide a lot of healing to teammates.

WhyConditioning

As a top laner you'll be building a lot of Armor and Magic Resist allowing granting Conditioning a lot of value in bonus resists.

WhyOvergrowth

Overgrowth's health scaling makes you a strong front-line tank when paired with health stacking items such as Knight's Vow and Targon's support item.

WhyManaflow Band

Manaflow Band empowers your ability to keep a healthy mana pool for sustained lane trading and harassment.

WhyTranscendence

Transcendence allows you to hit 40% CDR in the mid-game with just your support item, Lucidity boots, and Knight's Vow, allowing for tons of CC and damage in mid-game teamfights.