All of this requires a certain meta-gaming knowledge about the game.
As such, you really need to be in a sort of sweet spot in order to get it. The reason for this is that it depends on several factors, such as item level, your character level, and the level of the monster that dropped it. However, this can be very tricky to successfully pull off. There are only a couple of ways to reliably get a 4 socket Crystal Sword in Diablo 2: Resurrected.
