Weatherlight is the eleventh Magic expansion, released in June 1997 as the third set and second small expansion of the Mirage block.

Weatherlight also marked the beginning of the Weatherlight Saga, the most important Magic storyline, which continued through 2001.

The set contains 167 black-bordered cards (50 rare, 55 uncommon, and 62 commons).

Its expansion symbol is the Thran Tome, an important artifact of the Legacy whose contents change depending on who reads it.

Among the information contained in the Tome are the components and intended operation of the Legacy itself.