Legendary Potential is one of the core mechanics that elevates Last Epoch’s item progression system, allowing unique items to grow into some of the most powerful gear in the game. While the concept is straightforward, mastering the process requires understanding how Legendary Potential works, how to merge items, and how the Temporal Sanctum dungeon ties into the upgrade path. Having enough Last Epoch gold can also be a great help to you. This comprehensive guide walks through the entire journey—from acquiring the right items, to navigating the dungeon, to successfully forging coveted Legendary gear. It also explains Weaver’s Will, another late-game mechanic that enhances special items in its own unique way.

What Legendary Potential Does

Legendary Potential (LP) appears exclusively on unique items. LP determines whether a unique can become a Legendary—and more importantly, how many affixes it can inherit from an exalted item. A unique item can naturally roll anywhere from 0 to 4 Legendary Potential. Higher-level content increases the chances of finding uniques with LP, and once Empowered Monoliths become accessible, these items drop at significantly higher rates.

The number of LP on the unique directly determines how many affixes it will gain from the exalted item during the merging process. For example, a unique with 2 LP can receive two random affixes, while a 4 LP unique can receive all four available affixes from a qualifying exalted base.

Preparing the Items: Unique + Exalted

Before entering the dungeon where Legendary items are forged, two components must be in hand:

1. A Unique Item With Legendary Potential

This will serve as the base. Any unique can have LP, but the higher the content difficulty, the more frequently items will drop with 1–4 LP.

2. An Exalted Item With the Same Base Type

This is crucial. Item types must match exactly. A unique wand requires an exalted wand, a unique chest piece requires an exalted chest piece, and so on.

The exalted item must also have four total affixes, consisting of two prefixes and two suffixes. Even if an affix has been removed via a Glyph of Despair, the item is still valid as long as it maintains the proper affix structure. If a promising exalted item drops with missing affixes, the Forge can be used to craft it into the required state.

Once both items are ready, the next step is reaching the one location where Legendary items can be created: the Temporal Sanctum.

Navigating the Temporal Sanctum

The Temporal Sanctum dungeon is the heart of Legendary item crafting. Before entering, a Temporal Sanctum Key is required. Once inside, the dungeon introduces a unique mechanic: timeline swapping. Pressing the D key switches the dungeon between two versions of the map, often revealing new paths or bypassing hazards.

Dungeon Layout and Progression

The Temporal Sanctum consists of multiple floors. While layouts can vary, paths tend to lead upward or north, making those the best initial directions when navigating.

Throughout the dungeon:

Certain doors or terrain may be blocked in one timeline but passable in the other.

Progress often requires swapping back and forth to reveal objectives, interact with devices, or open new routing options.

This pattern continues until reaching the final floor, where the boss—Jura—awaits.

Defeating Jura Using Timelines

Jura is designed around timeline swapping. The fight becomes more complex as dungeon tiers increase, but the fundamentals always apply.

Jura’s most dangerous attacks include:

A large, circular clock-shaped hazard is placed on the ground.

Rotating beams that sweep across the arena.

Both threats can be avoided by shifting timelines. These hazards disappear when switching timelines, allowing safe repositioning. Players may either remain in a safe timeline until the effects expire or wait for Jura to shift between timelines and re-engage.

Upon defeating Jura, a passage opens leading to the chamber where Legendary forging takes place.

Forging a Legendary Item

The chamber contains the player’s stash and a special cache. Depending on the timeline, the cache will either:

Present the final Legendary item for pickup, or

Display the interface where the unique and exalted items are placed for merging.

If the wrong version appears, simply swap timelines.

To merge the items:

Place the unique with Legendary Potential in the left slot.

Place the exalted item with four affixes in the right slot.

The number of affixes transferred to the unique equals the amount of Legendary Potential on the unique item. These affixes are selected randomly from the exalted item’s pool. After confirming, swap timelines again to retrieve the completed Legendary from the alternate version of the cache.

Successfully merging items yields a powerful Legendary equipped with unique effects plus high-value affixes, making it one of the strongest gear pieces obtainable for any build.

Understanding Weaver’s Will

Weaver’s Will is often encountered alongside Legendary Potential, but functions entirely differently. Instead of merging with an exalted item, a Weaver’s Will item evolves independently through combat.

Each Weaver’s Will item begins with a special counter. When worn, the item gains experience as enemies are killed. At certain thresholds, it will:

Add a completely new affix, or

Upgrade an existing affix on the item.

These added affixes can be exceptionally strong—or completely irrelevant—depending on the build being used. Fortunately, Weaver’s Will items drop commonly at higher levels, allowing experimentation with multiple versions until desirable outcomes are obtained.

Conclusion

Legendary Potential, combined with exalted items and the Temporal Sanctum, offers one of the deepest and most rewarding progression paths in Last Epoch. Learning how to navigate the dungeon, prepare exalted gear, and merge affixes is key to maximizing late-game power. Weaver’s Will adds an alternative layer of item growth, giving players another exciting way to chase upgrades. With the right combination of preparation and luck, many builds can push far beyond their normal limits and harness the full power of Legendary items. Having plenty of cheap Last Epoch gold can also help you break through your limits.