The 'similar set of icons' mean that the string(text) is missing/referenced incorrectly. All of the modifiers seem to exist, so I would guess that this one in particular isn't referenced properly, so the game can't find it.
If someone finds an item prefixed with "Dilke's", Torkun's part should be a modifier for the same hero as that one.
I think it's either for Tork, or Maldri, since I just noticed that the text for their ability modifiers are using the same references. One of them is probably right, and the other is wrong (the modifier that you found, and for Torkun's as well).
If anyone gets a modifier for Tork or Maldri, or you can work out which one it's for, we should know.
"hmm now the hard decision... do i pick up my kids from school, or get on beta?"
Item Suffix Database: Link