Ornn

Abilities Overview

Ornn's passive, Forge God, allows him to purchase items anywhere and upgrade his own items at level 13. He can also upgrade one ally's item per teammate — this is Ornn's biggest late-game contribution. Q (Volcanic Rupture) creates a fissure that slows and leaves a terrain pillar after 1 second.

W (Bellows Breath) makes Ornn unstoppable and breathes fire in a cone, applying 'brittle' to enemies — the next CC against them deals bonus damage and extends the duration. E (Searing Charge) is a charge that knocks up on wall or terrain impact — synergizes with Q pillar. R (Call of the Forge God) summons a ram that charges twice — first slow, second knockup.

Laning Phase

Ornn is a safe laner with strong trading patterns. The brittle combo: W to breathe fire and brittle, auto to proc brittle for bonus damage, then Q to slow and create pillar. The Q-E combo (Q pillar + E knockup) is Ornn's primary trade and engage — practice the timing.

Ornn's sustain from Doran's Shield and second wind makes him hard to poke out. Look for all-ins at level 6 — R slow into Q-E knockup into W-auto for full combo. Ornn outscales most top laners through item upgrades — even losing lane, he provides immense value to the team post-13.

Teamfighting

Ornn is a primary engage tank. Start fights with R from long range — the ram's first pass slows, giving time for the second pass knockup. Follow up with Q-E knockup for more CC, then W-auto for brittle procs. In extended fights, Ornn is extremely durable with jacked resistances from upgrades.

Peel for your carries by using Q to zone enemies and E to knock away divers. Ornn's R can also be used defensively to disengage — the ram knocks back anyone in its path. Item upgrades at level 13 are a massive powerspike — teammates' upgraded items provide significant stat boosts that can swing teamfights.

Build Path

Start Doran's Shield. Heartsteel for infinite HP scaling. Sunfire Aegis for AoE burn. Jak'Sho for percentage resistances in extended fights.

Thornmail for armor and anti-heal. Abyssal Mask for magic resist and magic damage amp. Frozen Heart against attack speed comps. Gargoyle Stoneplate for the massive shield. Boots are Plated Steelcaps or Mercury Treads.

Matchups

Ornn is a safe blind pick into most top laners. He struggles against champions with percent-HP damage (Fiora, Vayne, Camille) who can ignore his tankiness. Against ranged tops, max Q for poke and farm safely. Ornn's best matchups are against other tanks who can't punish his weak early levels.

For more details, check the League of Legends Wikipedia page and the Ornn page on League of Legends Wiki.