Wind-Up Zenmaister

Level 4 EARTH/Machine Xyz Effect
1900 ATK / 1500 DEF

2 Level 4 monsters
This card gains 300 ATK for each Xyz Material attached to this card. Once per turn: You can detach 1 Xyz Material from this card to target 1 face-up monster you control; change that face-up monster to face-down Defense Position, and if you do, during the End Phase of this turn, change it to face-up Attack Position.

Rulings – Yugipedia

Printings:

Generation Force: GENF-EN042 (Ultimate Rare) - 2011-08-16
Generation Force: GENF-EN042 (Ultra Rare) - 2011-08-16
Collectible Tins 2011 Wave 1: CT08-EN002 (Secret Rare) - 2011-08-25
Battle Pack: Epic Dawn: BP01-EN028 (Rare) - 2012-05-24
Battle Pack: Epic Dawn: BP01-EN028 (Starfoil Rare) - 2012-05-24

Prices:

Cardmarket: 0.13 €
TCGplayer: $ 0.21