Seidan Prison Keys

Those ringed Seidan Prison Keys are in the possession of former Seidan Guardsman turned mercenary Dairou, and they first appeared in Mortal Kombat: Deception. The keys were later featured as another collectible relic under the name "Dairou's Keys" since they're his alone within the Konquest mode of Mortal Kombat: Armageddon.

These keys helped Dairou escape the Seidan Guard prison in Seido years ago. And later, Dairuo used them to help Shujinko break free from prison.