Twilight of the Gods
The three magical women, or giants, or witches, who weave threads of fate
Urd (Wyrd), Verdandi (Present) and Skuld (Debt or Future) are the names of the three main norns who weave, and cut, threads of fate for gods and mortals alike.
There are three strange, supernatural women, seen variously at many times and in many places, who either are these three legendary women, or serve them, or mimic them. Regardless, they know a lot of local lore, as well as lore of the gods and giants, and can trade on this information. The price is always high, however.
They vary in appearance and even sometimes in personality, but there are always three.
If one goes looking for the Norns, and are meant to find them, one will.