Rulings

• If the copied creature has {X} in its mana cost, X is 0.2025-11-17
• If the copied creature is copying something else, then the tokens enter as whatever that creature copied.2025-11-17
• The tokens created by Mirrormind Crown's ability copy exactly what was printed on the equipped creature and nothing else (unless that creature is copying something else or is a token; see below). They don't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.2025-11-17
• If the copied creature is a token, the tokens that are created copy the original characteristics of that token as stated by the effect that created that token.2025-11-17
• Any enters abilities of the copied creature will trigger when the tokens enter. Any "as [this creature] enters" or "[this creature] enters with" abilities of the copied creature will also work.2025-11-17