After seeing one the prizes for Worlds is a damage counters I'm wondering whether counters are legal for tournament use? The current rules state this:
Tokens
Tokens are representations of information about the game or game state. The presence of tokens is marked by one or more indicators. Indicators may also be used to represent multiple tokens, or other open or derived information.
Typically, players use the cardboard tokens included in official product as indicators. However, players may choose to use other items as indicators, so long as they do not obscure significant component information, are resistant to accidental modification, and their purpose of use is clear to both players. The marshal is responsible for determining the legality of an indicator and its reasonable use during a match if objected to by its owner’s opponent.
Let me know what you think.