From Diablo Wiki
Cursed Captives is a challenge set in Act I that requires you to release the spirits of 6 dead prisoners in The Cursed Hold for Queen Asylla in 2 minutes or under. There are three sets of bones to the left of the entrance and 3 to the right so in theory a minute to spend locating them on each side. If you beat the challenge you will be awarded the Cursed Captives achievement, 10 points and a banner motif.
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