- This item cannot be upgraded.
![[Devil's Key +2]](../graphics/Devil's Key +2.jpg)
- [Ingredient Item]
- Devil Square Invitation +1 [+2, +3, +4, +5, +6, +7]
- Devil's Eye +1 [+2, +3, +4, +5, +6, +7]
- Devil's Key +1 [+2, +3, +4, +5, +6, +7]
- NPC Chaos Goblin Machine
- Devil Square mini-game guide
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