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

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

: Each hero has multiple weapon sets (e.g., the Valkyrie can equip the Final Justice halberd or the Freedom Protector spear) that grant unique weapon abilities.

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

: The Crown is a unique "piece" found during levels; wearing it to the floor's exit grants a 500 gold bonus, but it drops if the player takes knockback damage. Usage and Progression

: 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!