This allows you to recycle your unwanted runes and turn them into enhance stones free of charge. The amount of enhance stones you’ll get will depend on the rune’s grade. Higher grade runes will yield more enhance stones. Consider enhancing the stones you don’t need since enhancing runes will consume enhance stones as well. Salvaged runes are gone forever and cannot be recovered. DO NOT SELL UNWANTED RUNES!
For selling multiple runes, you can tap them manually or tap the checkboxes on the top of the rune window to check all runes with the corresponding grade. Make sure to lock the runes you don't want to salvage (like low-grade rare ones) to prevent them from getting auto-selected for salvage.