Slot Enhancement Guide

Slot Enhancement lets you unlock gemstone slots on eligible equipment using Stone of Merien, Stone of Xelima, and Gold. Each eligible item can have up to 2 gemstone slots.

What Is a Gemstone Slot?

A gemstone slot is an empty socket on equipment that can hold one compatible refined gemstone.

Eligible equipment can have:

Which Equipment Can Be Enhanced?

Slot Enhancement is for normal wearable combat equipment.

If an item already has 2 slots, it cannot be enhanced any further.

Enhancement Materials

Every valid attempt requires both Stone of Merien and Stone of Xelima.

Material Formula

The amount of each Stone family follows the slot number you are trying to unlock:

So:

• Target Slot 1 → 3 Merien + 3 Xelima
• Target Slot 2 → 6 Merien + 6 Xelima

How an Enhancement Attempt Works

1. Select an eligible equipment item.
2. The system checks the item's current slot count.
3. The required Gold, Merien Stones, and Xelima Stones are checked.
4. The materials are consumed for the valid attempt.
5. The server performs the success roll for the target slot.
6. On success, the item's slot count increases by 1.
7. On failure, the equipment remains unchanged.

What Happens on Failure?

A failed attempt does not:

• destroy the item,
• reduce its current slot count,
• remove existing socketed gemstones, or
• damage the equipment's normal durability.

First-Try Probability

If you start from a 0-slot item and want to reach 2 slots with exactly one attempt at each stage:

That means the chance of reaching 2 slots without any failed attempt is:

Expected Attempts

For repeated independent attempts, the average number of attempts needed is:

These are long-run averages, not guaranteed results. You can succeed first try or fail several times.

Expected Gold Cost

Expected Stone Cost

Because Stones are consumed on both success and failure, the long-run average material cost is higher than the minimum first-try requirement.

Fragment Equivalent

Each full Stone is restored from 5 matching Fragments.

Minimum First-Try Materials

Long-Run Average Fragment Cost

Again, these are expected averages across many attempts, not fixed costs for one player.

Natural Slots

Some monster-generated equipment can already drop with gemstone slots naturally.

Natural Slot vs Enhanced Slot

A natural slot and an enhanced slot behave the same once they exist. The difference is simply how the slot was obtained.

Naturally slotted equipment therefore saves both Gold and Stones.

What Can Go Into the Slots?

Once a slot is unlocked, it can hold one compatible refined gemstone.

Armor and shields use defensive/recovery gemstone families, while weapons use offensive/farming gemstone families.

For the full list of gemstone families, ranges, same-family restrictions, socketing, and unsocketing, see the Gem Socketing Guide.

Slot Enhancement Achievements

Successful and failed slot attempts are tracked separately.

Successful Slot Enhancement

Failed Slot Enhancement

Practical Tips

• If an item already drops with 1 slot, you skip the entire 0 → 1 enhancement cost.
• A natural 2-slot item requires no Slot Enhancement at all.
• Do not attempt Slot 2 unless you can comfortably replace the 6 + 6 Stones if it fails.
• Because failure does not destroy the item, Slot Enhancement is safe for rare equipment as long as you can afford the materials.
• Keep Merien and Xelima Fragments in multiples of five so they can be restored efficiently into full Stones.
• Plan the gemstones you want before spending heavily on Slot 2.

Quick Reference