Windmill Genex

Level 7 WIND/Machine Synchro Effect
2000 ATK / 1600 DEF

"Genex Controller" + 1 or more non-Tuner WIND monsters
This card gains 300 ATK for each face-down Spell and Trap Card on the field. You can send 1 card from your hand to the Graveyard to select and destroy 1 face-down Spell or Trap Card.

Rulings – Yugipedia

Printings:

Duel Terminal 2: DT02-EN089 (Duel Terminal Ultra Parallel Rare) - 2010-05-25
Hidden Arsenal 2: HA02-EN059 (Secret Rare) - 2010-07-15

Prices:

Cardmarket: 0.66 €
TCGplayer: $ 0.30