Aurelion Sol Mid Build & Guide — Patch 26.18

Overview

Aurelion Sol is a sustained-damage mage whose kit revolves around two simple ideas: keep your Breath of Light (Q) channeled on a target for as long as possible (channel = an ability you keep casting continuously for several seconds, interruptible by hard crowd control), and use Astral Flight (W) to follow them when they try to run. His passive Cosmic Creator gathers a permanent resource called Stardust every time you damage a champion long enough — Stardust permanently grows the area, range, and execute threshold (an HP threshold below which the spell instantly kills the target) of his spells. The longer the game goes, the bigger and scarier each cast becomes. He has no instant burst combo: he wins by staying on top of enemies until the burn (damage that ticks over several seconds instead of landing all at once) finishes them.

Your mid-lane game plan is asymmetric. Early levels you trade in short windows (a brief exchange of damage in lane, not a full kill attempt): Q a champion when they walk up to last-hit, get one or two ticks of damage, walk back. From level 6 onward, W lets you cross terrain like a free Flash — use it to chase kills your jungler sets up (a "gank" — the jungler comes to your lane to help kill the enemy), or to disengage by flying back to your tower. Late game you become a back-line battlemage (a mage who fights at medium range, mixing spells with positioning instead of long-range artillery): stand at the edge of a teamfight (behind the front line — your tanks and bruisers, the durable melee fighters who soak damage for the team), channel Q through their bodies onto the enemy carry, drop Singularity (E) to pull enemies caught at the edge of the fight, and finish with Falling Star (R) when it stuns the carry.

Recommended Build

Starting items: Doran's Ring (the default first-buy ring for mages: a small chunk of AP, HP, and mana regen) + 2 Health Potions. Patch 26.17 cut Breath of Light (Q) to 30/35/40/45/50 mana, 5 less at every rank, so the early harass costs a little less — but Doran's mana regen is still mandatory, you spam Q every minion wave.

Core items (in order):

1. Liandry's Torment — burns a percentage of the target's max HP every second your Q is on them (so it hits tankier enemies harder, and the longer the channel the bigger the burn). Your single best item.
2. Sorcerer's Shoes — magic penetration boots: each cast ignores part of the enemy's Magic Resist, which deletes squishies (low-defence targets like ADCs and mages) faster.
3. Rabadon's Deathcap — multiplies your AP (Ability Power, the stat that scales magic damage) by an extra 30%. Every spell hits harder. Buy it third when ahead.
4. Shadowflame — bonus magic damage to enemies on low HP (HP-threshold passive — extra damage that activates only when the target is below a certain HP %). Lines up perfectly with R finishes.

Situational items:

• Zhonya's Hourglass — vs mobile assassins (Zed, Fizz, Talon). Stasis is your panic button if W is on cooldown.
• Banshee's Veil — vs hard single-target CC (Annie R, Lissandra R, Twisted Fate gold card). One blocked stun saves your channel.
• Rylai's Crystal Scepter — slows everything Q hits, keeping targets glued inside the breath cone.
• Void Staff — heavy magic penetration aimed at enemies who built Magic Resist. Swap to it when any priority target buys their first MR item.
• Morellonomicon — applies Grievous Wounds to enemies you damage (a debuff that cuts their healing and health regeneration by 40% for 3 seconds). Take it vs healing-stacking compositions (Soraka mid, Vladimir, Yuumi + heal-heavy bot lane).

Boots: Sorcerer's Shoes is default. Ionian Boots of Lucidity (boots that reduce your ability cooldowns) are an option if your team needs R ready more often as a teamfight engage tool.

Skill order: Max Q first (main damage source), E second (waveclear and AoE setup), W last. Take a point in R at levels 6, 11, 16. Keep W last even after the Patch 26.17 buff: the cooldown cut only touches ranks 2-5 (20/18/16/14 seconds, from 20.5/19/17.5/16), and rank 1 is still 22 seconds.

Runes: Primary Sorcery with Arcane Comet, Manaflow Band, Transcendence, Scorch. Secondary Inspiration with Biscuit Delivery and Cosmic Insight, or Resolve with Second Wind and Overgrowth if the lane is heavy ranged poke harass (low-commitment damage to whittle down your HP).

Key matchups

• Yasuo / Yone: Yasuo's Wind Wall blocks your Q breath line entirely, while Yone has no wall, only the Spirit Cleave shield. Save Q until Yasuo pushes the wall, then re-engage. Trade only when the wall is on cooldown.
• Zed / Talon: They burst you before W flight is ready, and the Patch 26.17 cooldown cut does not reach rank 1 — Astral Flight (W) is still 22 seconds in lane. Zed chains Living Shadow (W) and Death Mark (R) onto your Breath of Light (Q) channel; Talon crosses walls with Assassin's Path (E) and opens with Noxian Diplomacy (Q) from a side you did not ward. Buy Zhonya's Hourglass before Rabadon's Deathcap; never hold both Flash and W on cooldown at the same time.
• Veigar: Even pre-6 — he stuns inside his E cage; you out-poke from outside the cage with Q range. Post-6 he can one-shot you with E-W-Q-R if you stand still — keep moving sideways while channeling.
• Annie: Her stun is hidden in a passive counter that you cannot see clearly. Count her ability casts: every 4 casts she has a stun ready. If her Pyromania indicator (the orange flame icon under her portrait) is lit up, do not stand within Tibbers cast range.
• Twisted Fate: A race for who roams (leaves their lane to help other lanes) first. His R teleports across the map; your W can fly across terrain to follow him. Keep the mid minion wave shoving toward the enemy tower whenever you can, so if he leaves lane to gank bot, you free-farm CS while he's away and stay even.

Power spikes & win conditions

• Level 2: With Q + E you can pin a mistake against the lane wall — punishes anyone who walks too close to the river without vision.
• Level 6: First Falling Star unlocks an instant stun. Set up ganks with your jungler (when the jungler comes to your lane to help kill the enemy): E pull → R stun → kill.
• Liandry's Torment online (~ minute 11-13): Your sustained Q goes from chip damage (small, slow damage) to a real threat. Force fights at Drake spawns (the Dragon objective in the river that gives team-wide buffs) once Liandry's is online.
• Levels 14-15 (second and third point in W): Astral Flight (W) drops to 20 then 18 seconds after the Patch 26.17 cut, and 14 seconds at rank 5. That is where W stops being a once-per-fight commitment and becomes a repositioning tool between skirmishes — a takedown within 3 seconds still refunds part of the cooldown on top.
• 75 Stardust collected (~ minute 18-22): Your R upgrades to The Skies Descend — bigger area, knock-up instead of stun, AoE shockwave. This is your team-fight win condition; hold it for objectives instead of burning it on a single pickoff (eliminating an isolated enemy outside the team fight).

Common mistakes

• Channeling Q without flying. Standing still during the Q channel (an ability you keep casting for several seconds — interruptible by hard CC) makes you a sitting duck. W in the same direction your target is running so the channel continues at no extra mana cost while you stay safe.
• Using W aggressively with no exit plan. W is your only escape. If you fly into 3 enemies without setup (your jungler nearby, R ready, enough cooldown reduction stat to bring W back quickly), you die without dealing damage. Treat W as a commitment (an all-in — going for the kill with no easy way to back out), not a free mobility tool.
• Greeding for Stardust over kills. Stardust scales abilities long-term, but if the enemy carry is one-shot at 30% HP, finish them. A dead carry is worth more than 5 Stardust.
• Forgetting E pulls toward the center. Your E drags enemies into the middle of the zone — pull them INTO your team, not out of it. A misplaced E can save the enemy carry by pulling them away from your front line.
• Pushing the wave with Q in lane. Q pushes too slowly and burns mana. Use E to clear caster minions, then last-hit melees with auto-attacks. Save Q for trades and harass.

Advanced tip

The Q-W-Q chain is the technique that separates Aurelion Sol players. Cast Q on a champion, then immediately cast W in the same direction they are running. Because W removes Q's max channel limit while flying, you keep dealing damage continuously through the air — and Q can be re-cast mid-flight for a second instance if the original target dies and a new one is in range. In practice this lets you commit to a kill from very far away: W flies a long distance (1500 units) and during that flight your Q still hits anyone in front of you, so the threat zone is roughly W range plus Q range stacked. On takedown, part of W's cooldown is refunded so you can re-engage the next fight almost immediately.