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 Larzuk in Act V to add sockets to them.
'ShaelThulLem' is the runeword for the Treachery, so you only need to find three runes, and they're all easy to find. Of these, Thul is the easiest to obtain, it will start dropping in Act IV on Normal difficulty, and you can also get it in the Hellforge on Normal difficulty. But if you'd rather farm The Countess, then you'll need to do it on Nightmare or Hell difficulty. The Shael rune will start dropping on Act V on Normal difficulty, and you can also get D2R Items it from the Hellforge on Nightmare difficulty, or The Countess on Nightmare and Hell difficulty. The Lem rune will only start dropping in Act III in Nightmare, and you can get it in Nightmare or the Hellforge on Hell difficulty, and The Countess on Hell difficulty.
It should be noted that you need to put the armor in the order of the Shael rune, then the Thul rune, then the Lem rune, and then you will get a very powerful armor. Treachery is especially suitable for Assassins, and because of its ability to provide additional attack speed and the ability to fade in and out, it is suitable for Buy D2 Resurrected Runes any class. However, many players will choose to use it on the Mercenary because the increased attack speed makes them more powerful.
Diablo 2 Resurrected Items occupies a very important position in the game. When the player has excellent items, it can greatly improve the character's combat effectiveness, thus making it easier to win the battle. However, most of the finer items take a lot of time to obtain in the game, and in MMOWTS they are completely unnecessary. They will sell any Diablo 2 Resurrected Items you need, and you just have to place an order and get them within fifteen minutes.