Spirit Ryu

Level 4 WIND/Dragon Effect
1000 ATK / 1000 DEF

During your Battle Step, if this card battles (Quick Effect): You can discard 1 Dragon monster to the GY; this card gains 1000 ATK/DEF until the end of the Battle Phase.

Rulings – Yugipedia

Printings:

Legacy of Darkness: LOD-036 (Common) - 2003-06-06
Legacy of Darkness: LOD-EN036 (Common) - 2003-06-06
Starter Deck: Kaiba Evolution: SKE-023 (Common) - 2004-03-01
Dark Beginning 2: DB2-EN153 (Common) - 2005-07-27
Speed Duel Starter Decks: Duelists of Tomorrow: SS02-ENA08 (Common) - 2019-01-24

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.11