Xyz Block

Counter Trap

When your opponent activates a monster effect: Detach 1 Xyz Material from a monster you control; negate the activation, and if you do, destroy that monster.

Rulings – Yugipedia

Printings:

Lord of the Tachyon Galaxy: LTGY-EN072 (Common) - 2013-05-17
2014 Mega-Tin Mega Pack: MP14-EN047 (Common) - 2014-08-28

Prices:

Cardmarket: 0.06 €
TCGplayer: $ 0.31