Infinitrack Mountain Smasher

Level 7 EARTH/Machine Xyz Effect
2100 ATK / 3100 DEF

2 Level 7 monsters
When this card destroys an opponent's monster by battle: You can attach that monster to this card as material. You can only use each of the following effects of "Infinitrack Mountain Smasher" once per turn.
● You can detach 1 material from this card; it gains 1000 ATK.
● If this card is in your GY: You can Tribute 1 Machine Link Monster; Special Summon this card in Defense Position.

Rulings – Yugipedia

Printings:

The Infinity Chasers: INCH-EN008 (Super Rare) - 2019-03-21
2020 Tin of Lost Memories Mega Pack: MP20-EN213 (Ultra Rare) - 2020-08-27

Prices:

Cardmarket: 0.19 €
TCGplayer: $ 0.21