The Betrayer is a song from the Shovel Knight soundtrack. It is Music Sheet #44 and can be found in Tower of Fate: ????, Room 4b. This song is heard during the final boss battle against the Remnant of Fate.
With the amulet shattered and the Enchantress subdued, the true evil is exposed.
- "Bard: Let's see here... Oh, you found "The Betrayer"! So, helpful tip for my fellow bards: never accept amulets as payment. Trust me. Don't."