Go to Cindle (Kilt shop) in Halas and say "I need a piece of Mammoth Hide Parchment", she will give you the parchment.

Go to Greta (Outside near the kilt shop) in Halas and say "I need some Ink" she gives you the ink.

Take these to Jinkus in the Shaman Guild. Give them to him and he will give you a wanted poster.

Take this to the barbarian guards by the bank in Qeynos and they will give you a scroll.

Bring this back to Jinkus and give it to him, he will then give you the symbol.

The symbol will summon a magical hammer that is useful as a magic weapon until you get something better.