Every printing we track, with today's reference value. Cards someone is selling show the lowest price.
6 cards

Fairy King Truesdale
World Championship 2004: GBA Promo #WC4-001

Kinetic Soldier
World Championship 2004: GBA Promo #WC4-002

Slate Warrior
World Championship 2004: GBA Promo #WC4-003

Valkyrion the Magna Warrior
World Championship 2004: GBA Promo #WC4-E001

Sinister Serpent
World Championship 2004: GBA Promo #WC4-E002

Harpie's Feather Duster
World Championship 2004: GBA Promo #WC4-E003