theros sealed booster box MTG / mortals have found a way to endure Magic: The Gathering - Theros

The first main expansion is Base Set , released in Japan on October 20, 1996, and in English on January 9, 1999

When this card destroys a monster by battle and sends it to the Graveyard: You can destroy 1 monster your opponent controls

The R after the collector number and above the artist credit denotes the card as a rare

Schnirelmann, Victor (2015)

Just then, a mysterious boy wearing a helmet arrives and Yudias recognizes him as "That Guy", the one who invented Rush Duels

First, count the cards on the field, and in each player's hand, the text says to do it second, but having this knowledge before you set it off is important