Cheapest priced copy (Lorwyn Eclipsed): $0.79 at Card Kingdom, near mint, their price list as of .
Mirrormind Crown 
Artifact — Equipment · Rare · Lorwyn Eclipsed Promos · #258p
As long as this Equipment is attached to a creature, the first time you would create one or more tokens each turn, you may instead create that many tokens that are copies of equipped creature.
Equip {2}
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.79 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn Eclipsed | 258 | Rare | $0.79 | $0.79 |
| Lorwyn Eclipsed | 381 | Rare | $1.79 | $1.99 |
| Lorwyn Eclipsed Promos | 258p | Rare | $0.99 | $0.79 |
5 rulings from Wizards of the Coast
- 17 November 2025If 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.
- 17 November 2025Any 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.
- 17 November 2025The 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.
- 17 November 2025If the copied creature is copying something else, then the tokens enter as whatever that creature copied.
- 17 November 2025If the copied creature has {X} in its mana cost, X is 0.