Les cinq cartes Ivory Cup, Crystal Rod, Throne of Bone, Iron Star et Wooden Sphere, de l'édition Limited (Alpha), forment un cycle appelé "Lucky charms".
Ce cycle a inspiré un cycle similaire, paru dans l'édition Darksteel (voir cette anecdote).

Source 1 (#36 / No 36) - Source 2 (The Medallions - "For those unaware, "lucky charms" was a nickname for a cycle of artifacts in Alpha (Ivory Cup , Crystal Rod , Throne of Bone , Iron Star , and Wooden Sphere ) that gained you life whenever a player cast a certain spell.")