Heavy Forward (ETCO-EN066) [Eternity Code]

When this card is activated: You can add 1 "Infinitrack" monster from your Deck to your hand. Once per turn: You can target 1 Machine Xyz Monster you control, then activate 1 of these effects;
<br>• Change its battle position.
<br>• Attach this card to it as material.
<br>You can only activate 1 "Heavy Forward" per turn.