Phantom Beast Cross-Wing

Level 4 LIGHT/Beast-Warrior Effect
1300 ATK / 1300 DEF

While this card is in the Graveyard, "Gazelle the King of Mythical Beasts" and all "Phantom Beast" monsters on the field gain 300 ATK.

Rulings – Yugipedia

Printings:

Yu-Gi-Oh! GX Tag Force promotional cards: GX02-EN001 (Super Rare) - 2006-11-16
Gold Series 2009: GLD2-EN011 (Common) - 2009-04-21
Speed Duel: Battle City Box: SBCB-EN044 (Common) - 2020-11-26

Prices:

Cardmarket: 0.05 €
TCGplayer: $ 0.16