Board Thread:Artifact Assembling Swap Shop/@comment-32647676-20170727034954/@comment-31632066-20170728130828

A Fandom User told me you can search collections by reward. Searching "lock" I found six collections that reward locks: Warlock's Gifts (15), Precious Products (25), Harbingers of Misfortune (20), Newspaper Clippings (10), Sharp Blades (30), and Mystery of the Cave (50).

[Note: When you search "lock" you'll get anything containing "lock" -- so you'll also get clock, warlock, etc.] Again, I have to thank that lurker, Fandom User, for teaching me this. :-)