Aegis-fang is a magical and legendary warhammer is tied to the character Wulfgar, a barbarian hero from the Icewind Dale region who is featured in several novels written by the American author R. A. Salvatore, such as the The Icewind Dale Trilogy.
The warhammer was forged by the dwarf king Bruenor Battlehammer and is inscribed with dwarven runes that spell out its name. It’s also made from mithral, which is a lightweight and extremely strong metal from the Dungeons & Dragons game.