Heroes of Might & Magic III: Horn of the Abyss

And also, all sorts of these "birds of knowledge" and others that affect perception. It could be implemented so that possessing these artifacts gives you a 5/10/15% chance to learn a spell upon gaining a level. 2 DARK_DRAGON Oh, oh, got offended, great black dragon) 2 DARK_DRAGON Never mind, forget about it!