First you need to find a set of 3-socket body armor as a base before you can craft the Treachery runeword in Diablo 2: Resurrected. Light Plate is the lowest level of 3-socket body armor and starts dropping on Act III on Normal difficulty, but you may find it easier and earlier on the Secret Cow Level. If you get a non-socketed set of Light Plate then you can use the Horadric Cube, or use...