: Each "piece" is tied to one of the five heroes: Thor (Warrior), Thyra (Valkyrie), Merlin (Wizard), Questor (Elf), and Lilith (Necromancer).

: These are specialized items (like the Freeze Ring or Siren's Lute ) that provide powerful active abilities on a cooldown.

: You primarily use gold found in dungeons to purchase these pieces. The Slayer Edition emphasizes gold collection to unlock these upgrades rather than the old passive achievement system.

: If you are referring to a "piece" of a specific set or a quest item in a different game (like the "Crystal Armor Piece" in Old School RuneScape 's Gauntlet), please clarify the specific context!

: Heroes can equip different sets of armor that change their physical appearance.