Another Otus gem!
"I" is another interesting Type, by the way. In the core books, it only appears with Rocs. It emphasizes platinum and gems with a slight chance of one magic item. I guess when you can eat elephants, you can be picky about the shiny objects that litter your nest.
But back to N & O, I wonder what creature(s) the gang at TSR were thinking of when creating those listings. Someone (something) that had ready access to potions or scrolls, obviously. Perhaps alchemical-inclined or spellcasting monsters of some sort?