Magical Runes Runes are magical inscriptions on the dungeon floor, which cast a spell or detonate when something steps on them. Flying objects don't detonate runes.
Runes are invisible most of the time.
The spell 'disarm' may be used to try and destroy a rune you've discovered. You may store any words you like in this rune, and people may apply it to read it. This rune will not detonate, nor is it ordinarily invisible. Your runes will be partially invisible. That is, they'll be visible only part of the time.