Gaia the Magical Knight of Dragons

Level 7 WIND/Dragon Fusion Effect
2600 ATK / 2100 DEF

1 "Gaia The Fierce Knight" monster + 1 Level 5 Dragon monster
This card's name becomes "Gaia the Dragon Champion" while on the field. You can only use each of the following effects of "Gaia the Magical Knight of Dragons" once per turn. During the Main Phase (Quick Effect): You can target 1 other card on the field; this card loses exactly 2600 ATK, and if it does, destroy that card. When this card destroys an opponent's monster by battle: You can make this card gain 2600 ATK.

Rulings – Yugipedia

Printings:

Rise of the Duelist: ROTD-EN037 (Starlight Rare) - 2020-08-06
Rise of the Duelist: ROTD-EN037 (Super Rare) - 2020-08-06
2021 Tin of Ancient Battles: MP21-EN124 (Prismatic Secret Rare) - 2021-09-30

Prices:

Cardmarket: 0.41 €
TCGplayer: $ 0.44