Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Phantasmal Form 
Instant · Common · Foundations Jumpstart · #344
Until end of turn, up to two target creatures each have base power and toughness 3/3, gain flying, and become blue Illusions in addition to their other colors and types.
Draw a card.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 344 | Common | $0.35 | — |
| Modern Horizons | 61 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 14 June 2019Phantasmal Form overwrites all previous effects that set the target creatures' power and toughness to specific values. Other effects that set their power or toughness to specific values that start to apply after Phantasmal Form resolves will overwrite this effect.
- 14 June 2019Effects that modify the target creatures' power or toughness (such as the effects of Force of Virtue or Giant Growth) will apply no matter when they started to take effect. The same is true for counters that change the creatures' power or toughness (such as +1/+1 counters).
- 14 June 2019You may cast Phantasmal Form without choosing any target creatures. You'll just draw a card. However, if you choose any targets and all of those targets become illegal before the spell tries to resolve, the spell won't resolve and you won't draw a card.