The Talisman of Betrayal is a medium-sized, intricately designed pendant with a dark, metallic finish, featuring a central blood-red gemstone encased in twisted, thorn-like silver metalwork. The gem pulses faintly with a sinister glow, suggesting its cursed nature. The talisman's surface is adorned with ancient Norse runes, deeply engraved and filled with a tarnished bronze substance, adding to its ominous and mystical appearance.