Are there rules regulating the use of tokens (small objects placed on cards to track effects, buffs, damage, etc.) in Riftbound?

Ruling: Based on the rules found, external objects can be used to signify damage. Generally, tokens are acceptable as long as all players understand what they represent and they're not intrusive to the game.

Nuances:

• Tokens should not be too big or have inappropriate images
• Some TCGs have rules limiting external objects to only signify open knowledge (information all players can see)
• The specific rule found in Riftbound allows external objects to signify damage