Cheapest priced copy (Tarkir: Dragonstorm Commander): $3.49 at Card Kingdom, near mint, their price list as of .
Deceptive Frostkite 
Creature — Dragon · 1/1 · Rare · Tarkir: Dragonstorm Commander · #19
Flying
You may have this creature enter as a copy of a creature you control with power 4 or greater, except it's a Dragon in addition to its other types and it has flying.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $3.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tarkir: Dragonstorm Commander | 19 | Rare | $3.49 | — |
| Tarkir: Dragonstorm Commander | 59 | Rare | $4.99 | — |
6 rulings from Wizards of the Coast
- 4 April 2025Any enters abilities of the copied creature will trigger when Deceptive Frostkite enters. Any “as [this creature] enters” or “[this creature] enters with” abilities of the copied permanent will also work.
- 4 April 2025Deceptive Frostkite copies exactly what was printed on the original creature and nothing else, with the listed exceptions (unless that creature is copying something else or is a token; see below). It doesn’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, or so on.
- 4 April 2025If the copied creature is copying something else, then Deceptive Frostkite enters as whatever that creature copied, with the listed exceptions.
- 4 April 2025If the copied creature is a token, Deceptive Frostkite copies the original characteristics of that token as stated by the effect that created the token, with the listed exceptions.
- 4 April 2025If the copied creature has {X} in its mana cost, X is 0.
- 4 April 2025You can choose not to have Deceptive Frostkite enter as a copy of another creature. If you do, it will just be a 1/1 Dragon with flying.