Mechquipped Angineer (German) - "Mechbestückter Engenieur" (AC14-DE004) - (Super Rare) - Advent Calendar 2014 (Adventskalender ZEXAL-Edition) Limited

2 Level 3 monsters
Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 face-up Attack Position monster you control; change it to face-up Defense Position, and if you do, it cannot be destroyed by battle or by card effects this turn.