Gekkabijin evolution recipe

Answer: Requirements to evolve Twin Dragon into Gekkabijin

Weapon level alone is not enough. Trigger Gravedigger at least once during the same run.

Steps

1. Obtain Twin Dragon and raise it to level 8.
2. Keep Karoma's Mana in your inventory.
3. Trigger the Gravedigger Glimmer with Twin Dragon at least once during the same run.
4. Open an eligible chest after every requirement is complete.

If it does not evolve

• Confirm that Twin Dragon is level 8.
• Confirm that Karoma's Mana is in your inventory.

• Confirm that Gravedigger triggered during the same run.
• Open an eligible chest only after every requirement is complete.

For a two-stage evolution chain, the first and second evolution each require a separate eligible chest.

Next guides

• First 12 Emerald Diorama evolutions
• Emerald Diorama progression guide

Sources

• Vampire Survivors Wiki: Evolution
• Vampire Survivors Wiki: Glimmers

Sources rechecked: October 24, 2026.