Cheapest priced copy (Secrets of Strixhaven Promos): $0.49 at Card Kingdom, near mint, their price list as of .
Colorstorm Stallion 
Creature — Elemental Horse · 3/3 · Rare · Secrets of Strixhaven · #299
Ward {1}, haste
Opus — Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. If five or more mana was spent to cast that spell, create a token that's a copy of this creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven Promos | 180p | Rare | $0.49 | $0.49 |
| Secrets of Strixhaven | 180 | Rare | $0.49 | $0.49 |
| Secrets of Strixhaven | 299 | Rare | $1.49 | $1.99 |
4 rulings from Wizards of the Coast
- 20 March 2026The token doesn't copy whether Colorstorm Stallion is tapped or untapped, whether it has any counters on it or Auras attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.
- 20 March 2026The token copy will have Colorstorm Stallion's ability and will be able to create copies of itself.
- 20 March 2026An opus ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack.
- 20 March 2026In the unusual case where Colorstorm Stallion becomes a copy of something else while its triggered ability is on the stack but before it resolves, the token will enter as a copy of whatever Colorstorm Stallion is copying.