When the enemy team makes a match including more than one friendly special tile, Mr. Fantastic’s “Master of the Fantastic” animation plays for every special tile that was matched. This gets annoying when you have a lot of special tiles out - for example, in the current PVP with 3-star Storm.
Ideally it should behave like Doctor Strange’s “Flames of the Faltine”; play the animation once per turn, and have subsequent triggers in the same turn just flash a banner instead.