Dragunity Dux

Level 4 WIND/Winged Beast Effect Monster
1500 ATK / 1000 DEF

Gains 200 ATK for each "Dragunity" card you control. When this card is Normal Summoned: You can target 1 Level 3 or lower Dragon "Dragunity" monster in your GY; equip that target to this card.

Rulings – Yugipedia

Printings:

Duel Terminal 3: DT03-EN059 (Duel Terminal Super Parallel Rare) - 2010-09-25
Hidden Arsenal 3: HA03-EN031 (Secret Rare) - 2010-12-02
Dragunity Legion Structure Deck: SDDL-EN004 (Common) - 2011-03-04
Legendary Collection Kaiba Mega Pack: LCKC-EN084 (Ultra Rare) - 2018-03-08
Hidden Arsenal: Chapter 1: HAC1-EN149 (Duel Terminal Ultra Parallel Rare) - 2022-02-24

Prices:

Cardmarket: 0.18 €
TCGplayer: $ 0.10