Yu-Gi-Oh! World Championship Tournament 2004 promotional cards is a 2004 Yu-Gi-Oh! set with 6 cards on its set list. Its most valuable cards by market price include Valkyrion the Magna Warrior, Harpie's Feather Duster, and Sinister Serpent.
Prices as of Oct 12, 2026
| No. | Card | Rarity | Price |
|---|---|---|---|
| WC4-001 | Fairy King Truesdale | Prismatic Secret Rare | $7.77 |
| WC4-002 | Cipher Soldier | Prismatic Secret Rare | $8.03 |
| WC4-003 | Slate Warrior | Prismatic Secret Rare | $10.45 |
| WC4-E001 | Valkyrion the Magna Warrior | Prismatic Secret Rare | $173.36 |
| WC4-E002 | Sinister Serpent | Prismatic Secret Rare | $36.68 |
| WC4-E003 | Harpie's Feather Duster | Prismatic Secret Rare | $144.56 |