Go to deconstruct a blighted mithril focus bracelet and it has:
Resource Qty Skill Used Your Skill Min Skill Opt Skill
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Shining Blight Core 0 Ingenuity 1042 880 880
Peridot1Jewelcraft 937880 1080
Mithril Bar1 Jewelcraft 937 880 1080
Something wrong with the Shining Blight Core?