0.5 Return of the Ancients shipped with a crafting toy that breaks the old rules: Olroth's Legacy. Feed it a unique item and it rips a single modifier off that unique, then hands you that mod back as a socketable rune. The unique dies in the process. What you keep is one line of text you can bolt onto a rare of the same base.
That is the whole pitch of the Runes of Aldur league. The mods worth chasing are the build-defining ones — 100% local attack speed from a Quill Rain, +3 to all Spell Skills, a free keystone on a helmet. Pull one of those onto a properly itemised base and you get a stat line no rare could ever roll on its own.
You meet Farrow in Clearfell early in the campaign — a young blacksmith trying to revive lost Ezomyte Runesmithing. Talking to her unlocks the league's crafting interface and starts the rune economy rolling.
The core loop runs on Ezomyte Remnants. Every zone seeds these ancient stones, and each one offers a choice between a set of Runes and a pile of currency. Pick the runes and the area spawns monsters empowered by whatever symbols you chose; kill them, take the reward. Early stone remnants carry two rune slots. As you level, the slots multiply, and combining runes builds items — a Tempest plus a Lightning Rune cooks up an Orb of Augmentation, for example.
From Act 4 the system folds into Expedition. You unearth ancient graveyards by chaining explosives, and every rune sitting in that chain applies to the whole pack you dig up. Longer chains mean nastier monsters and fatter loot. It is the endgame face of the same mechanic you learned on Farrow's anvil.
Two new systems ride along with the league. Runic Ward is a buffer pool forged onto armour with Verisium through Runeforging — it soaks hits below your Life and Energy Shield, a third health bar in everything but name. Runic Alloys are a crafting currency that strips a random mod off an item and replaces it with a guaranteed one you can only get this way. There are also Kalguuran skills: colourless gems with no attribute requirements that burn Runic Ward instead of Mana.
Olroth's Legacy is the currency that does the extraction. Use it on an eligible Ezomyte or Kalguuran unique and it destroys the item, pulls out one modifier, and turns that mod into a rune. Which mod? Random. A unique with five mods gives you roughly a one-in-five shot at the line you actually wanted, so plan on burning a few copies of anything multi-mod.
Extraction is not free power, either. GGG scales several values down on the way out — Quill Rain hands over half its attack speed instead of the full 100% on some pulls. Treat every number in the list below as the unique's printed value, and expect the rune to land at or under it.
Now the rule that shapes every decision you make here.
Within that fence you get freedom: extracted runes drop into both rares and other uniques of the matching class. So the play is to find a clean rare base — high crit, good attack speed, whatever the build wants — and weld a unique's signature mechanic on top of it. Eligible bases are tagged Ezomyte (older Wraeclast uniques) or Kalguuran (new 0.5 items tied to Olroth).
This is the shortlist of uniques worth feeding to Olroth's Legacy — the ones whose standout mod can carry or outright enable a build. Each table is grouped by base class, which doubles as the only slot that rune will ever fit. Mod values shown are the unique's printed numbers; extraction may scale them down.
Body armour holds the heaviest defensive and damage-conversion lines in the game, so these are the runes that rewrite how a character takes a hit or scales a stat.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| The Unleashed · Revered Vestments | 100% increased Spell Damage; +1% to all Maximum Elemental Resistances | Flat global spell damage plus a max-res push — the standout 0.5 caster extraction. |
| Blackbraid · Fur Plate | +(100–150)% of Armour also applies to Elemental Damage | The engine mod for armour-stacker hybrid defence. |
| Bramblejack · Rusted Cuirass | 250% of Melee Physical Damage taken reflected to Attacker | Build-enabling for thorns and reflect archetypes. |
| Kingsguard · Full Plate | Recover 5% of maximum Life per Endurance Charge consumed | Recovery-on-charge-consume — the key to charge-spender builds. |
| Bristleboar · Leather Vest | Gain 5 Rage when Hit; 10 Rage when Critically Hit | Rage generation for any Rage-stacking melee setup. |
| Edyrn's Tusks · Iron Cuirass | 50% chance to inflict Bleeding on Hit; 50% reduced Slowing Potency of Debuffs | Free bleed application and heavy slow mitigation in one line. |
| Foxshade · Quilted Vest | 100% increased Evasion Rating when on Full Life; 10% increased Movement Speed when on Full Life | Strong evasion-stacker pick for full-life playstyles. |
| Briskwrap · Rhoahide Coat | (40–60)% increased Flask Recovery rate; Deflection equal to (20–30)% of Evasion | Flask-heavy and Deflection builds get both at once. |
| Irongrasp · Vagabond Armour | Iron Grip and Iron Will keystones | Two keystones on one rune — strength-scaling for attacks and spells. |
| Ashrend · Pathfinder Coat | Cannot be Ignited | A clean ignite immunity slot for fire-heavy maps. |
Helmets are the keystone-and-warcry slot here. A few of these runes drop an entire passive keystone into one socket, which is the kind of return that bends a build around it.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Ezomyte Peak · Soldier Greathelm | (10–20)% increased Area of Effect; Unwavering Stance keystone | AoE and a stun-immunity keystone in a single rune. |
| Deidbell · Elite Greathelm | (20–30)% Warcry Speed; Warcries explode corpses; (20–30)% Warcry AoE | Three warcry mods at once — the warcry-build headliner. |
| Crown of Thorns · Twig Circlet | Pain Attunement keystone | Low-Life spell scaling welded onto any helmet. |
| The Vile Knight · Shielded Helm | Deal 4% increased Damage to Rares/Uniques per second in your Presence (max 200%) | A ramping boss-DPS rune that pays off on long fights. |
| Greymake · Brimmed Helm | +(30–50) to Strength, Dexterity and Intelligence | Triple-attribute swing for attribute-stacker builds. |
| The Smiling Knight · Cowled Helm | (15–25)% increased Critical Hit Chance; Aggravate Bleeding on Critical Hit | Aggravate-on-crit makes bleed builds tick at full rate. |
| Starkonja's Head · Leatherbound Hood | 150% increased Evasion when on Low Life; 15% of Hit damage taken from Companion first | Survivability for low-life and companion builds. |
| Horns of Bynden · Rusted Greathelm | Gain 1 Rage on Melee Hit; every Rage grants 1% increased Armour | Rage-to-armour scaling for tanky melee. |
| Wings of Caelyn · Rusted Greathelm | Gain 1 Rage on Melee Hit; every Rage grants 1% increased Stun Threshold | Rage-to-stun-defence twin of Horns of Bynden. |
| Elevore · Hunter Hood | Charms gain 1 Charge per second; +1–2 Charm Slots | Charm-uptime build enabler. |
| Keeper of the Arc · Spiritbone Crown (drops from Olroth) | Every 5 seconds, alternate 40% less Damage from Hits / 40% less Damage over Time | An alternating-defence mod you can get nowhere else. |
Gloves are short on entries but heavy on impact — the crit-base rune here is one of the strongest single lines in the whole system.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Northpaw · Suede Bracers | Base Critical Hit Chance for Attacks is 7%; (10–15)% increased Critical Damage Bonus | Setting base attack crit to 7% is one of the best glove runes for crit builds, full stop. |
| Deathblow · Doubled Gauntlets | Culling Strike; (20–30) Life and Mana per Enemy Killed | Global Culling Strike on gloves is worth roughly two Witchhunter ascendancy points for one socket. |
| Candlemaker · Sombre Gloves | Chance to Ignite is doubled | The chief target for any ignite build. |
Boots carry movement and a couple of mods that simply don't exist on the slot otherwise, like flat block.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Wanderlust · Wrapped Sandals | Your speed is unaffected by Slows | The iconic anti-slow mod, now portable to any boot. |
| Legionstride · Rough Greaves | +10% to Block chance; −10 Physical damage from Projectile Attacks | Flat block on boots is unique to this rune. |
| The Knight-errant · Mail Sabatons | Iron Reflexes keystone | Evasion-to-armour conversion as a single rune. |
| Trampletoe · Trimmed Greaves | Deal 30% of Overkill damage to enemies within 2 metres | A chain-clear and explode rune for mapping. |
| Bushwhack · Lizardscale Boots | Physical Damage is Pinning | Pin conversion for physical builds. |
| Briarpatch · Laced Boots | +15% to Thorns Critical Hit Chance | Niche but real for thorns crit setups. |
| Obern's Bastion · Stacked Sabatons | 200% increased Stun Recovery; (30–50)% reduced Chill/Freeze/Shock Duration | Heavy ailment-and-stun defence for melee. |
Block builds eat well this league. Several of these runes were built to define a block meta, and one of them drops straight off the league boss.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Svalinn · Crucible Tower Shield (drops from Olroth) | (200–300)% increased Armour; Chance to Block is Lucky; take (0–20)% of damage from Blocked Hits | On a well-itemised shield this rune could define the block meta. |
| Chernobog's Pillar · Blacksteel Tower Shield | Gain 1% of damage as Fire per 1% Chance to Block | Pairs spectacularly with stacked-block and shield-throw builds. |
| Alkem Eira · Blazon Crest Shield | Damage Blocked is Recouped as Mana | Mana sustain through blocking for cost-heavy builds. |
| Wulfsbane · Painted Tower Shield | Permanently Intimidate enemies on Block | Global intimidate on block is a damage-amp enabler. |
| Dunkelhalt · Leather Buckler | Take 50% of damage from Blocked Hits; 50% increased Parried Debuff Magnitude | A strong defensive rune for parry off-hand builds. |
| Oaksworn · Sigil Crest Shield | 50% increased Life Regeneration Rate; +(17–23)% to Chaos Resistance | Regen-and-chaos-res patch for life-based builds. |
| Rondel de Ezo · Plated Buckler | 100% increased Block chance against Projectiles; Enfeeble enemies on Block | Projectile block plus a free curse on block. |
| Dionadair · Splintered Tower Shield | Double Stun Threshold while Shield is Raised; 20% reduced Stun Threshold | Stun-immunity-adjacent defence for raised-shield play. |
One-handers are where minion, lightning and stun builds find their missing piece. Two of these pull from the same Torment Club base, so the rune you extract decides which build you're feeding.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Mjölner · Torment Club | +(2–4) to Level of all Lightning Skills; (250–350)% increased Physical Damage | The +2–4 Lightning Skill levels is the meta-target one-hander rune. |
| Trenchtimbre · Spiked Club | +(1–2) to all Minion Skills; Minion Attack Speed bonuses also affect you | Extremely strong for minion-attacker hybrids. |
| Olrovasara · Torment Club (drops from Olroth) | On Hit, gain added Lightning equal to enemy's Power for 20s (up to 500) | A stacking damage rune that snowballs against bosses. |
| Tyranny's Grip · Ironhead Spear | Strikes deal Splash Damage; (150–200)% increased Physical Damage; Knockback on Hit | Splash on a spear is a niche but real melee enabler. |
| Brynhand's Mark · Wooden Club | Causes Double Stun Buildup | Doubles stun output for stun-lock mace builds. |
| Serle's Grit · Kalguuran Forgehammer | Empower-an-Attack skills have 14% chance not to count that Attack | The empower-non-count mod is the notable pull for empower combos. |
This is the headline category. The Quill Rain rune is arguably the single strongest candidate in the whole system, and the slam and crit mods here aren't far behind.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Quill Rain · Shortbow | 100% increased Attack Speed (local); (50–100)% increased Arrow Speed | Pulling local attack speed free of Quill Rain's damage penalty makes the fastest bows PoE 2 has ever seen. |
| Ironbound · Warden Bow | 23% chance to Chain again; Arrows Return after Piercing a Fully-Broken-Armour target | Arrow-return on pierce is the keystone bow rune for return builds. |
| Hrimnor's Hymn · Oak Greathammer | Slam Skills cause an additional Aftershock; (80–120)% increased Physical Damage | The extra-Aftershock line is the headline slam-build extraction. |
| Hoghunt · Felled Greatclub | +15% to Critical Strike Chance (local); Maim on Critical Hit | +15% local base crit on a two-hander is absurd value. |
| Twisted Empyrean · Aberrant Sledge | Convert 100% Fire to Cold with Mace Skills; Added Cold equal to 6–10% of max Mana | Fire-to-cold conversion plus mana-scaled cold — both build-defining. |
| Brain Rattler · Studded Greatclub | All damage with this Weapon causes Electrocution buildup | The enabler for electrocute mace builds. |
| The Sentry · Gothic Quarterstaff | No Physical Damage; Adds (25–32) to (40–50) Fire; 100% increased Flammability Magnitude | Full fire-conversion staff for ignite and Flammability builds. |
| The Blood Thorn · Wrapped Quarterstaff | Causes Bleeding on Hit | Free bleed application for quarterstaff attackers. |
Wands and staves are all about gem levels and cast speed, and these runes hand out the biggest spell-level swings in the game.
| Unique · Base | Standout Mod | Why It Enables Builds |
|---|---|---|
| Adonia's Ego · Siphoning Wand | +3 to Level of all Spell Skills; (15–30)% increased Cast Speed | A flat +3 to every spell skill is a major caster target. |
| Lifesprig · Attuned Wand | +(1–3) to all Spell Skill Gems; (5–10)% Cast Speed; Life Leech on Cast | The headline wand rune for any spell build. |
| Cursecarver · Acrid Wand | +4 to Level of a Random Curse Skill; (80–100)% increased Spell Damage | The +4 random curse level is a curse-build enabler. |
| Dusk Vigil · Ashen Staff | Gain (30–50)% of Damage as Extra Fire; Trigger Ember Fusillade on Cast | Gain-as-extra-fire is a top damage pull for fire casters. |
Amor Mandragora (Changeling Talisman) is the standout here: it carries Hinder-on-Presence and a generator that grants Druidic Prowess per 20 Rage spent, plus (10–15)% increased Skill Effect Duration. Four more amulet and talisman bases are eligible for extraction — Duality, Spiteful Floret, A Worthy Foe and Runeseeker's Call — worth grabbing if their mod pool fits your build.
