Both T7 affixes need to Last Epoch gold be in the prefix category because those are the ones intended to transfer. Suffixes are considered optional bonuses.

The starting item contains:

Empty prefix

T1 Crit Multi

T7 Elemental Res

Cold Res

Not ideal, but usable.

Step 1: Fixing the Prefixes

The first task is establishing the correct affixes. Spell Crit must be added to fill the second prefix slot. Both prefixes start at tier 1, which is acceptable because upgrades will follow.

Glyphs of Hope should be used during the entire process to preserve Forging Potential. Once potential reaches zero, the item is finished.

Spell Crit is added with only two potential losses-an excellent start.

Step 2: Shifting Tiers Into the Correct Slots

Next comes the critical step: using Runes of Havoc. Havoc shuffles the tiers among all affixes. The goal is to pull the T7 Elemental Resistance off the suffix slot and into a prefix position, while nudging the T1 prefixes upward.

This typically takes multiple attempts and often ruins items. But this time, the shuffle lands perfectly:

The T7 moves onto Crit Multi

Spell Crit rises to T4

A near-ideal setup for a high-value slam.

The item now contains:

T7 Crit Multi

T5 Spell Crit

T7 Elemental Res

Cold Res

Now it's time to plan upgrades and risks.

Step 3: Choosing What to Upgrade

With a 2-LP unique, only two affixes will transfer. That means attention should be focused on:

T7 Crit Multi (guaranteed)

T5 Spell Crit (desired)

Upgrading the resistances isn't necessary. Damage-focused prefixes are the priority.

Crit Multi is guaranteed to transfer during a Tier 2+ slam because a guaranteed affix may be chosen. Spell Crit has a 1-in-3 chance.

Since the Crit Multi roll is mid-range and Forging Potential is low, a Rune of Refinement can be attempted after upgrading Spell Crit-if potential allows.

Spell Crit is raised to T5 without losing excessive potential. Good outcome.

A Refinement is attempted on Crit Multi, resulting in a roll to 55-solid. With remaining potential, Elemental Resistance is upgraded for free.

Next step: duplication.

Step 4: Duplicating the Item (Rune of Creation)

With potential nearly exhausted, a Rune of Creation is used to duplicate the item. This produces two identical catalysts, each ready for slamming. Two attempts instead of one-an enormous advantage.

Step 5: Performing the Slam in the Temporal Sanctum

To create a Legendary, the following are required:

A unique with Legendary Potential

A matching exalted item

A Temporal Sanctum key

Enter the dungeon through the key and run Tier 2 or higher. Tier 2+ allows the guaranteed-affix mechanic needed for controlled slams.

The unique item in question requires level 36, qualifying it for Tier 2, though Tier 4 is often chosen for fun or familiarity. After defeating Julra and realm-swapping to avoid mechanics, the Eternity Cache becomes accessible.

Deposit:

The unique

The exalted catalyst

Then choose the guaranteed affix: T7 Crit Multi.

The remaining 1-in-3 chance can land:

Spell Crit (best)

Elemental Res (acceptable)

Cold Res (worst)

In this attempt, Elemental Resistance is absorbed-not ideal, but still usable. The duplicate item provides another future opportunity. Having a lot of cheap Last Epoch gold will be a great help to you.

Additional Examples: Boots, Belts, and More

Boots with 1-LP remain simple: identify the single required affix-Movement Speed-add T1 MS, then use Havoc until the T7 lands correctly. Slam and finish.

Belts can be significantly harder. One example belt had no relevant affixes, making it a near-disaster. Even then, progress is possible:

Add the desired affixes

Seal unwanted ones

Shuffle tiers with Havoc

Use Chaos to replace undesirable patterns

Upgrade with Hope until potential runs out

Even poor bases can occasionally become excellent items when affixes are manipulated correctly.

Final Thoughts

Crafting and slamming Legendaries becomes much simpler when broken into steps:

Identify the important affixes

Apply correct affixes first

Use Havoc to move T7S into optimal positions

Upgrade only what matters for the available LP

Slam at Tier 2+ for guaranteed affix selection

If you've ever wondered how to craft and slam the most powerful, whether you're aiming to build your dream Lich setup or perfect a Paladin's relic, we'll cover the entire process: what to look for, how to craft efficiently, and how to slam your item for maximum potential. Having a lot of Last Epoch gold can also be very helpful.

Understanding What You're Crafting

Before you even start crafting, know exactly what you're trying to make. For example, let's say you're building a Lich and want to craft the perfect offhand using the Stygian Coal. The goal is to combine a Stygian Coal with Legendary Potential (LP) and an exalted item that has your desired affixes.

Each LP represents how many affixes from the exalt will transfer over when slamming. A 4 LP item can absorb all four affixes, while a 2 LP item can take two. The more LP, the greater your potential to create a true god-tier item.

Step 1: Picking the Right Base Item

Started with a 2 LP Stygian Coal and a catalyst that had T7 crit multi - one of the most desirable stats in the game. The goal was to transfer that T7 crit multiplier into the unique through the legendary crafting process.

When looking at an item, consider two main things:

Affixes - Do you have the stats you actually need?

Forging Potential - The number of times you can safely craft before the item locks.

If your forging potential hits zero, you can't modify it further. However, if your item is close to perfect, you can use a Rune of Creation to duplicate it, giving you two shots at slamming for the perfect Legendary.

Step 2: Start Crafting

Begin by adding or improving the affixes you need. For example,  Added spell crit to complement the existing crit multi. Always use a Glyph of Hope while crafting to minimize the loss of forging potential with each upgrade attempt.

If your best affix is sitting in the wrong slot, use Runes of Havoc to shuffle tiers around. This process is risky but can produce miraculous results - like moving a T7 crit multi onto the perfect prefix slot.

Sometimes you'll completely miss and ruin your item. Other times, you'll hit what calls "the miracle" - the exact roll you wanted. Accept that luck is part of Last Epoch's crafting philosophy.

Step 3: Decide What to Upgrade

Once you have the correct affixes in place, focus on upgrading the ones that matter most. In the Lich example, prioritized crit multi (for pure damage) and spell crit.

However, every upgrade consumes potential. If an upgrade could consume all your remaining potential, consider safer plays, like upgrading a resistance stat that only costs 1-10 potential points. Balancing risk versus reward is the heart of endgame crafting.

You can also seal an unwanted affix to make room for a new one. For instance, sealing off cold resistance lets you craft void resistance in its place. Sealing does not prevent you from slamming - it just hides that affix from the fusion process.

Step 4: Fine-Tune with Rune of Refinement

When you're nearly done, check your key stats' values within their roll range. If your crit multi rolls mid-tier (say 52 out of 58), you can use a Rune of Refinement to reroll it to a higher value - if you have potential left.

Refine only the stats that are guaranteed to transfer during the slam. Don't waste resources perfecting affixes that might not move over.

Step 5: Duplicating and Preparing to Slam

If your item still has potential, duplicate it using a Rune of Creation. This gives you a backup copy to try again in case your slam doesn't hit the desired stats. Once you're satisfied with your setup, it's time to slam.

How to Slam in the Temporal Sanctum

Slam crafting happens in the Temporal Sanctum, where you fuse your unique and exalted item into a Legendary.

Get a Temporal Sanctum Key - Right-click it to open the dungeon.

Run at Least Tier 2 - Only tier two or higher guarantees that one chosen affix will transfer.

Match Item Requirements - Each tier of the Sanctum allows certain level requirements. For instance:

Tier 2: Accepts items up to level 65

Tier 3: Up to level 75

Tier 4: No restrictions (required for the rarest gear)

When you reach Jolra, the boss of the Sanctum, defeat her and interact with the crafting cache. You'll see a dropdown list where you can select one guaranteed affix to cheap Last Epoch gold transfer.