Quotation1 Proficiency level is reduced and advancement stops. Quotation2
— Description, Sonic and the Black Knight[1]

The Iron Shackle is a collectible item that appears in Sonic and the Black Knight.


When equipped, the Iron Shackle lowers and stops the advancement of proficiency.


  • No:
  • ID Point Price:
  • Rarity Level: 7/10
  • Item Type: Special Item
  • LocationGreat Megalith


  1. Official in-game description of Iron Shackle in Treasury.

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