A Failstack is an indicator of the times you have continuously failed at enhancement. The more times you fail enhancement in a row, the more failstacks you obtain. The more failstacks you have, the greater your chances to succeed at the current upgrade.

Enhancement Chance +
Valk’s Enhancement Chance +
Permanent Enhancement Chance

= TOTAL FAILSTACK

The total Failstack number is the large yellow number on the top right.

 

Failstack Building Tip:

  • If available, check the “Durability” option, which increases chances of gaining a failstack. Durability option often doubles the difficulty of enhancement.
BDO Failstack: Enhancement Chance

Failstack Terms Defined

  • Percentage: the chance the current Enhancement will succeed.
  • Increase Enhancement Chance: total Failstacks
  • Valk’s Enhancement Chance: increase this up to 10 from Valk’s Cry and Fairy’s Blessing
  • Enhancement Chance: This character’s failstack. An indication of the times this character has failed enhancement in a row. (Enhancement Chance is reset upon enhancement success.)
  • Permanent Enhancement Chance: up to +4 family-wide failstack from completing Rulupee Adventure Log.

How Do You Make a Failstack?

To purposefully build a failstack, purchase cheap Reblath Shoes sold by Tranan Underfoe in Velia. Then gather up some Black Stone (Armor). Right click the stone and click to enhance. Keep going until you have a failstack of 22.

If you have more Black Stone (Weapon), you can use Militia weapons instead. Purchase from Alfredo in Velia.

The goal is to get your failstack item to +14. The greatest chance for obtaining a cheap failstack occurs as you try to upgrade +14 to +15. There is only a 2% chance that the armor/weapon will enhance with 0 failstacks.

Because cheap gear is used, building failstacks isn’t as expensive. (Reblath shoes only cost about 13k silver. Compare that to the cost of repairing boss gear with Memory Fragments.)

Tranan Underfoe
<Blacksmith>

BDO Blacksmith Shop: Reblath

Devour

You can also build a new failstack or add to your existing failstack by destroying already enhanced gear.

To view details, please view our Devour Guide.

 

Failstack Costs

BDO Enhancement: Recover Max Durability

Failstacks are a good thing, but they do cost you! Every time you fail enhancement, you lose at least 5 Max Durability on the item you are trying to upgrade, plus your enhancement mats.

For higher level gear enhancement of DUO+, you can actually downgrade the item. So a DUO could become a PRI on failure. (Cron Stones prevent the building of failstacks.)

Accessories are not recommended to build failstacks, due to the higher cost. Both accessories are destroyed upon failure.

Max Durability is repaired by visiting the Blacksmith and clicking Repair > Recover Max Dur.

Max Durability can be repaired by destroying another of the same kind.

 

Max Durability lost often depends upon the Enhancement consumable used.

Black Stones: -5 Max Durability.
Concentrated Black Stones: -10 Max Durability

Total Cost of Failstack = Black Stones + identical gear for repair or Memory Fragments.

 

Loosing Your Failstack

If the item you are building your failstack on accidentaly upgrades to +15, then you can go to a priest to have it de-leveled “Cleansed” for 100k Silver. That will put your gear back to +14 level.

Unfortunately, you have to start all over with a failstack of 0.

For this reason, some players refuse to use gear that is not already useful and demanded on the Marketplace. If it does happen to level up, then they forgo cleansing and have something they can sell. (Example: popular green gear like Heve helmets.)

Example Failstack Building Strategy:

  1. Failstack 1 to 22: click +14 Reblath Shoes
  2. Failstack 23 to 28: click PRI Heve Helmet
  3. Failstack 29 to 43: click DUO Heve Helmet
  4. Failstack 44 to 88: click TRI Heve Helmet
  5. Failstack 89+: click TET Heve Helmet

In the above failstacking example, you can keep or sell any of the helmets that accidentally upgrade.

Failstack Building Tips

  • Failstack Saving:
    • open up all 4 Naderr’s Belt slots, enabling you to save up to 4 failstacks to use on all characters
    • each character can build a seperate failstack, to save for later
    • switch characters, if your failstack is too high for the current enhancement
    • buy Blacksmith’s Secret Books to save failstacks

 

When doing enhancement, there will come a point when the failstack gets too high and you need to save it for later.

There are several options for this.

The most difficult one is to switch characters. It’s more time consuming. You have to transfer all your enhancement mats via storage and wait for the game to load.

Naderr’s Band is a huge improvement. I highly recommend, if you plan on doing much enhancement. And it doesn’t cost silver, unlike Blacksmith’s Secret Book.

Valk’s Cry

Pearl Costume Valks’ Cry Extracted Cron Stone Extracted
Helmet 8 24
Armor 18 54
Gloves 7 21
Shoes 7 21
Main Weapon 12 36
Sub-weapon 7 21
Awakening Weapon 14 42
Total 73 219

Valk’s Cry adds +1 to the Failstack, increasing the Enhancement Chance.

Valk’s Cry can only increase the Failstack by a maximum of 10.

Valk’s Cry from Loyalties:
Purchase Valks’ Cry with 100 Loyalties. It’s limited to 5 per Family per week.

Valk’s Cry from Pearl Costumes:
Pearl costumes can be turned into Cron Stones or Valk’s Cry at a Blacksmith.

 

BDO Valk's Cry for Loyalties

Fairy’s Blessing

BDO Fairy's Blessing

Fairy’s Blessing is just like using Valk’s Cry. It will add +1 to Valks Enhancement Chance. Any combination of Valk’s Cry and Fairy’s Blessing cannot exceed +10.

 

  • Laila’s Petal can be exchanged for Fairy’s Blessing from Fairy Queen Theiah or Ceilyn. (Laila’s Petal can be obtained by defeating monsters, Gathering, and Fishing.)
    • Laila’s Petal x10 → Fairy’s Blessing x1
  • You have to complete the quest “[Awakening] Traces of Edana” or reach Lv. 30 to use this item.
  • Ceilyn is located to the right of Herawen in Kamasylve Temple. However, this exchange will not be activated when the quests ‘Laila’s Scattered Petals’ and ‘Mysterious Companion’ are under progress.

Failstack of 20 or 40 with Dragon Scale Fossils

BDO Dragon Scale Fossil for Advice of Valks

You can turn in an item that drops from mobs at Sherekhan Necropolis to get an Advice of Valks.

Advice of Valks gives you an instant failstack, as long as you don’t currently have a failstack greater than your passive enhancement chance from Rulupee’s Adventure Log.

Sherekhan Necropolis is located in Drieghan. It is a level 60+ hunting area with a recomendation of 200 AP. View it on somethinglovely.net map.

 

Dragon Scale Fossil Exchange Rates:

  • 30 for Advice of Valks (+20)
  • 350 for Advice of Valks (+40)
BDO Sherekhan Map

Blacksmith’s Secret Book

BDO Blacksmith's Secret Book

Blacksmith’s Secret Book is used to store your current Enhancement Chance. This will make your current Failstack fall to 0, but enables you to start again and use your stored Failstack for a more suitable item.

Blacksmith’s Secret Book is available at any <Blacksmith> in town.

  • Blacksmith’s Secret Book – 20: 1 million Silver
  • Blacksmith’s Secret Book – 30: 1.5 million Silver
  • Blacksmith’s Secret Book – 40: 2 million Silver
  • Blacksmith’s Secret Book – 50: 3 million Silver (also available in Pearl Shop)
  • Blacksmith’s Secret Book – 100: Pearl Shop only: 200 Pearls for 1, 1500 Pearls for 10

Blacksmith’s Secret Book converts your Enhancement Chance amount into an Advice of Valk’s with equal Valk’s Enhancement Chance.

The number shows the maximum amount of Enhancement Chance that you can store. For example, if you currently have an Enhancement Chance of +41, you cannot use Blacksmith’s Secret Book – 40. You must buy Blacksmith’s Secret Book – 50.

BDO Blacksmith's Secret Book Cost

Blacksmith’s Secret Book – 100 (P2W Reward)

Blacksmith’s Secret Book – 100 is only available via the Pearl Shop. This allows you to store a 100 Failstack. You can also buy the Blacksmith’s Secret Book – 50 on the Pearl Shop, but these are easily available at the Blacksmith.

Blacksmith’s Secret Book – 100 Full Price:

  • Quantity 1: 200 Pearls
  • Quantity 10: 1500 Pearls

These do go on sale periodically and there are sometimes coupons available.

BDO Blacksmith's Secret Book - 100 from Pearls

These are not available via the Loyalty shop.

Easy Failstack Sharing with Naderr’s Parchment

Naderr’s Parchment unlocks up to 4 slots in Naderr’s Band.

Naderr’s Band lets you save up to 4 failstacks for later, without having to switch characters or buy a Blacksmith’s Secret Book. Once they are unlocked, you can freely load and unload failstacks. These Nadder failstacks are accessable to every character.

BDO Naderr's Band for Saving Failstacks

Unlock All 4 Naderr’s Slots:

 

  • Black Spirit Quest: [Naderr’s Band] Magic of the Dark Energy
    • level 58+
    • talk to Black Spirit, click Suggested tab
    • quest line is short and simple, just talking to several NPCs
  • 10,000 Loyalties (limit 1)
  • Pearls: 1,100 each (buy 2)
BDO Naderr's Band: Pearl Shop Cost

Naderr’s Penalty:

  • If you store a failstack of 100+ inside Naderr’s, you will get a 10 minute penalty, preventing you from immediately using your Naderr’s Band again.
  • Valk’s Enhancement Chance does not count toward the penalty.

How Many Failstacks Should I Use?

Failstacks have an optimal range. For many enhancement levels, there are “Softcaps”, in which you get significantly less Enhancement Chance from increasing to the next Failstack.

For example, 70% Enhancement Chance is the Softcap for the majority of armor and weapons. Going over this, will make enhancing that item extremely more expensive.

Keeping Softcaps in mind, there is an optimal range that most players use for certain levels of enhancement. For this reason, players say to stop failstacking or to save that Failstack, after you have gained a certain number. This is in order to use that too high failstack on an item of a lower enhancement level. Using a very high failstack on a low level weapon would be a waste of the silver you spent gaining that high failstack. (Example: don’t use a 100 failstack on upgrading a +15 to PRI.)

Some levels of enhancement, like TET, PEN, and +15 have no soft cap and these are difficult most of the time. (There are now beginner gear options that have unusually high levels of enhancement. Naru Gear and the next step up, Tuvala Gear.)

For more info, please view our Failstack Charts that show softcaps.