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Black Crystal Fusion

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Black Crystal Fusion is a system introduced in Season 6 - Act 01 [1] that allows players to upgrade their Fiend War Supertemporal Armor & Prey-Isys Raid Black Sky Accessories/Special Equipment into Level 100 Equipment. This system can be accessed through NPC Administrative Officer Dorothy in Chest Town.

Upgrade Requirements


  • These upgrades are final and cannot be reversed once they're done, so make your decision carefully.
  • If you plan on upgrading an entire set (i.e. Normalizing Synchro, Elementalist's Accessory) or individual set pieces (Mother Nature), more Black Crystal.png Black Crystals will be needed to meet those requirements.
  • The Equipment's grade may likely be different depending on the option change slightly, but this doesn't apply towards the highest grade that's 100%.
  • There are some events in-game can give out a Level 100 Recipe that reduces the Black Crystal cost down to 950.
  • Black Crystal Fusion Equipment cannot be obtained outside of upgrading from Dorothy.
  • Reinforcement/Amplification/Enchantment levels can be transferred over, but they will require more Engraving Stones to keep their values from decreasing.
  • Reinforcement bonuses cannot be transferred.
  • Retextured Armor will also be brought over if choosing to upgrade Super Tayberrs into Mother Nature's Breath Set.

Applicable Items