PoE Deep Altar Blessings Guide (3.29): How to Convert Common Currency Into Rare Orbs

Updated for PoE 3.29.2 Curse of the Allflame (patched 2026-08-05). Last verified 2026-08-21.

Quick answer: A Deep Altar is an interactable that spawns on the seafloor inside Charts and Voyages in PoE 3.29. Make an Offering to the Deep and it grants a Blessing that gives every stack of certain common currency a chance to be converted into a rarer currency — party-wide, for everyone nearby. As of the 3.29.2 patch (August 5, 2026), that chance is 10% per eligible currency (20% when the Blessing is Empowered), up from 4%/8% at league launch. The trade-off: Deep Altars now spawn less often, so each one you find is worth more. Deep Altars do not grant the conversion effect in Ruthless.

Key takeaways

• Deep Altars are a free wealth multiplier. You are already picking up common currency in Charts and Voyages; the Blessing rerolls some of it upward into rarer orbs at no cost beyond the Offering.
• The 3.29.2 numbers matter: base conversion chance 4% → 10%, Empowered 8% → 20%. That more than doubled the value of every Altar this league.
• It is party-wide. The Blessing applies to all nearby players, which makes group Chart/Voyage farming noticeably stronger than solo.
• Altars now appear less frequently (3.29.2), so treat every one you see as a priority — don't walk past it.
• This is a 3.29 league mechanic. It exists only inside the Curse of the Allflame seafloor content and will disappear when the next league launches (projected late November 2026).

Curse of the Allflame gave Path of Exile one of the richest seafloor farming loops in years, and buried inside it is a mechanic a lot of players still walk straight past: the Deep Altar. It doesn't drop loot in the obvious sense. Instead it quietly upgrades the currency you're already collecting into something worth more — and after two rounds of buffs, it has become one of the cleanest "free money" interactions of the league. This guide covers exactly what Deep Altars do in 3.29, the current conversion numbers after 3.29.2, how to farm them, and whether they're worth chasing before the league ends.

What are Deep Altars in PoE 3.29?

Deep Altars are altar interactables that appear on the seafloor — the underwater areas you descend into from The Sovereign (Corsair captain Valerie's ship) via the Bathysphere when you run Charts and Voyages, the two core mechanics of the Curse of the Allflame league.

You find them the same way you find everything else down there: while you're placing Allflame Lanterns to hold back the drowning timer and clearing the seafloor for treasure chests, Dead Man's Sulphur, gold, and Scarabs. When you reach a Deep Altar, you make an Offering to the Deep at it, and in return it grants a Blessing that affects you and any nearby party members.

Two things make Deep Altars easy to miss:

• The reward is invisible in the moment. Unlike a chest, an Altar doesn't spray loot on-screen. Its Blessing changes the odds on the currency you pick up afterward, so the payoff is spread across the rest of the run.
• They compete for your attention with the drowning mechanic. On the seafloor you're on a timer — step outside a lantern's green oxygen ring and you drown in roughly five seconds — so it's tempting to sprint for the exit and skip the Altar. Don't. The Blessing is one of the highest expected-value interactions on the floor.

What does a Deep Altar Blessing actually do?

The headline Blessing this league is currency conversion. When it's active, certain common currencies you would otherwise pick up get a chance to be converted into a rarer currency instead — think common shards and low-tier orbs rolling up toward the mid and high end of the currency ladder. Because Path of Exile's economy is entirely orb-based barter, converting a slice of your junk currency into rarer orbs is a direct, compounding boost to a run's profit.

Two properties make it much stronger than it looks on paper:

• It's party-wide. GGG confirmed in the 3.29.1 notes that "Blessings granted by Offerings to the Deep Altars now provide chances for certain common currency to be converted to rarer currency," and that the Blessing applies to all nearby players. In a group, one Altar buffs everyone's drops at once.
• There's an Empowered tier. Some Blessings come through Empowered, which grants a higher conversion chance than the base version. If you can get Empowered Blessings, your effective conversion rate roughly doubles again.

One hard exclusion to know: the conversion effect is disabled in Ruthless. Everywhere else it's live.

How much did the 3.29.2 buff change the numbers?

A lot. At league launch (3.29.1) the conversion existed but the odds were low. The 3.29.2 patch (August 5, 2026) roughly doubled them. Straight from the official 3.29.2 patch notes:

"Blessings granted by Offerings to the Deep Altars now grant a 10% chance for certain common currencies to be converted to rarer currencies (from 4%)."

And for the upgraded tier:

"Empowered Blessings of the Deep now grant a 20% chance for certain common currencies to be converted to rarer currencies (from 8%)."

Here's the before/after at a glance:

Blessing tier	Conversion chance before 3.29.2	Conversion chance now (3.29.2)
Base Blessing of the Deep	4%	10%
Empowered Blessing of the Deep	8%	20%

There is one catch that keeps this honest: in the same patch, GGG noted that "Offerings to the Deep Altars now appear less frequently." So the value per Altar went up sharply, but the number of Altars you run into went down. Net effect for most farmers is still a clear win — a 10%/20% conversion on the Altars you do find is far more impactful than a 4%/8% conversion on slightly more of them — but it's why you should never skip an Altar now: they're rarer and each one is worth much more than it was at launch. As a quality-of-life bonus, the Altar also now displays the conversion chance on its Offering, so you can see exactly what you're getting.

How to farm Deep Altars for currency in 3.29

Deep Altars aren't a standalone strategy — they're a multiplier you bolt onto the Charts-and-Voyages loop you're already running. The playbook:

• Run Charts to build toward Voyages. Get Charts from Cursed Treasure inside your maps or buy them off the trade market (Chart gold fees were slashed in 3.29.1, so buying batches is viable). Roll each Chart to keep the reward modifiers your build can handle.
• Descend and clear the seafloor properly. Launch from a Bathysphere, place your Allflame Lanterns to keep oxygen zones open, and actually explore — don't beeline the objective. Deep Altars, chests (including the newer Sunken Opulence and Sunken Gems chests added in 3.29.1), and Dead Man's Sulphur are all things you'll skip if you rush.
• Make the Offering at every Deep Altar you find. With the 3.29.2 frequency nerf, treat each Altar as a priority pickup. Interact, make the Offering to the Deep, take the Blessing.
• Then keep picking up currency. The Blessing works on currency you collect while it's active, so the sequence matters: Altar first, then loot the rest of the floor. The more common currency you scoop up afterward, the more chances to convert.
• Chain into a 9-Chart Voyage. Escape each Chart to mark it Charted, arrange nine of them in the Voyage Planner, and run the Voyage — the high-end version of the loop where the real profit lives, and where Deep Altars, chests, and Cursed Ducats all stack together.

If you want the full seafloor loop rather than just the Altar piece, our Charts & Voyages currency-farming guide walks through lantern management, drowning survival, and building an optimal Voyage board, and the best 3.29 currency-farming strategies breakdown shows where the Allflame loop ranks against Kalguur Ore, Expedition, and the other lanes.

How to squeeze the most out of every Blessing

Because the conversion is a chance per eligible currency, your job is to maximize the number of eligible currency stacks the Blessing sees:

• Farm in a group. The Blessing is party-wide. Two or three players clearing the same seafloor under one Blessing multiply the number of currency pickups the conversion rolls against.
• Prioritize Empowered. A 20% conversion is double a 10% conversion. Whenever you can get an Empowered Blessing of the Deep, take it.
• Juice the seafloor before you Offer. Higher monster quantity and rarity — from Chart mods, the 3.29.3 Cursed Ducats you socket in the Voyage Planner, and Golden Lanterns — means more currency drops, which means more conversions per Blessing. If you're not familiar with the Voyage-juice system, our Cursed Ducats guide covers how to socket up to three of them safely.
• Don't gamble your survival for it. The seafloor drowning timer is real. An Altar you die reaching is worth nothing. Place lanterns first, then collect.

A realistic mindset: the conversion won't hand you a Mirror. It quietly turns a percentage of the low-end currency you were already going to vendor or ignore into rarer orbs — Chaos and, over enough runs, the occasional Divine Orb. Across a full farming session that adds up to a meaningful bump in profit per hour, on top of loot you were collecting anyway.

Is farming Deep Altars worth it in 3.29?

Yes — with the right expectation. Deep Altars are not a headline strategy you build an Atlas around; they're a free efficiency layer on top of the league mechanic you're already running for other reasons. The cost to use one is trivial (the Offering plus a few seconds), the risk is only the seafloor timer, and the 3.29.2 buff pushed the payoff from "barely noticeable" to "genuinely worth stopping for."

If you're farming Charts and Voyages this league — and given how strong that loop is for currency, you probably should be — skipping Deep Altars is leaving free currency on the floor. Just remember the clock on the whole thing: everything Curse-of-the-Allflame-specific loses most of its value when the next league arrives. GGG hasn't dated 3.30 yet, but trackers project it for late November 2026, with ExileCon on November 7–8. Front-load your seafloor farming now while the mechanic — and the buffed Blessings — are live.

FAQ

What is a Deep Altar in Path of Exile 3.29? It's an interactable altar that spawns on the seafloor inside Charts and Voyages during the Curse of the Allflame league. You make an Offering to the Deep at it and receive a Blessing — most importantly, a chance to convert some of your common currency into rarer currency for you and nearby players.

How much currency does a Deep Altar Blessing convert? After the 3.29.2 patch (August 5, 2026), a base Blessing gives certain common currencies a 10% chance to be converted into a rarer currency, and an Empowered Blessing gives a 20% chance — up from 4% and 8% at league launch. The Altar now displays the exact conversion chance on its Offering.

Did Deep Altars get nerfed in 3.29.2? Both, really. The conversion chance was buffed (4%→10%, 8%→20%), but Offerings to the Deep Altars now appear less frequently. The value per Altar went way up while the count went down, so the practical advice is to never skip one.

Do Deep Altar Blessings work in Ruthless? No. GGG's patch notes state the currency-conversion effect does not apply in Ruthless. In standard leagues it's fully active.

Are Deep Altars worth stopping for on the drowning timer? Yes, as long as you're safe. The Blessing is one of the highest expected-value interactions on the seafloor and it's party-wide, so it benefits your whole group. Place your Allflame Lanterns to hold the oxygen zone, then make the Offering — don't risk drowning to reach one you can't survive getting to.

Will Deep Altars still exist after 3.29? No. They're part of the Curse of the Allflame seafloor content, which is a temporary league mechanic. When the next league (projected late November 2026, GGG-undated) launches, the Allflame content — Charts, Voyages, Deep Altars and all — leaves the core game. Farm it while it's live.

Skip the grind and stock up on rare currency directly. The Deep Altar Blessing nudges your farm upward, but if you need orbs fast to fund a craft or a build this league:

- Buy PoE Divine Orbs — the premier high-value trade currency, delivered fast.

- Buy PoE Chaos Orbs — the workhorse trade and crafting currency.

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