Legacy Runes are a seasonal addition in Diablo 4, brought in from Diablo 2. These runes are used to make Runewords, and if you are looking for the recipes for the Runewords check out our guide here.
But just like the runes in Diablo 2, you can upgrade these in the cube to get the next highest tiered rune, but it does not work for every single rune. Since a few runes are missing, there is a gap in the crafts and you are unable to make Mal rune in the cube. Below is all the available recipes for rune crafting and how to craft them.




