You searched for rune protection
1. rune protection
Runes that give rune protection can be bound with an item and protect the
next rune that fails on it from disappearing upon use. For example, you
might bind a dexterity rune to your claw. It binds successfully. The next
dexterity rune fails. Because of the rune protection on the claw, the
dexterity rune will remain in your inventory for a second attempt but the
success rate of that rune will decrease by half. If the success rate is an
odd number, the new success rate will be half plus one (such as a 5% rune
will turn into a 3% rune).
When you bind a rune protection rune to your equipment, the effect will be
displayed on lore like 'rune protection +2'. The +2 means that two failed
runes will be protected. Once the second rune fails, the protection magic
will disappear and the effect will no longer be displayed on lore.