In which situation would a player most likely face Disqualification?

Disqualification is a serious penalty that is typically imposed in situations where a player exhibits behavior that undermines the integrity of the game. Manipulating game materials deliberately falls into this category because it indicates an intent to cheat or gain an unfair advantage over an opponent. This action directly contravenes the principles of fair play and sportsmanship that are fundamental to competitive Magic: The Gathering.

The nature of manipulating game materials can include actions such as marked cards, altering physical game components, or any form of dishonest manipulation that could affect gameplay. Such actions threaten both the fairness of the match and the reputation of the game itself, warranting immediate disqualification to uphold the integrity of the tournament and protect all participants.

In contrast, other situations such as playing without sleeves, arguing over game rules, or taking a short break, while they may warrant penalties or warnings, do not inherently carry the same level of severity as deliberate manipulation of game materials. These actions might be addressed with lesser penalties, reflecting their different impacts on the game’s integrity.