What type of infraction involves a player physically manipulating game materials to gain an advantage?

Manipulation of Game Materials is an infraction that specifically pertains to a player intentionally altering or interfering with game materials in a way that could provide an advantage in the game. This type of infraction acknowledges that physical actions taken by players—such as shuffling their opponent's deck poorly, marking cards, or otherwise adjusting components of the game state—can directly impact the outcome of a match unfairly.

This infraction emphasizes the importance of maintaining the integrity of game components and ensuring that all players have a fair opportunity to compete based on skill and strategy, rather than the manipulation of materials. The focus is on actions that go beyond normal gameplay and enter the realm of unfair advantage, making it crucial for maintaining professionalism and fairness in the game environment.

The other options relate to misconduct or errors in the game but do not specifically address the physical alteration of game materials. Unsportsmanlike Conduct typically refers to behaviors that undermine the spirit of the game, while Collusion involves players working together against the rules, and Improper Procedure relates to errors in executing game rules or processes, none of which directly involve manipulating game materials.