Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Heroic Reinforcements 
Sorcery · Uncommon · Foundations · #241
Create two 1/1 white Soldier creature tokens. Until end of turn, creatures you control get +1/+1 and gain haste. (They can attack and {T} this turn.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
6 printings · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 226 | Uncommon | $0.35 | $0.49 |
| Foundations | 241 | Uncommon | $0.35 | $0.49 |
| Core Set 2019 | 217 | Uncommon | $0.35 | $0.49 |
| Phyrexia: All Will Be One Commander | 118 | Uncommon | $0.35 | — |
| Fallout | 218 | Uncommon | $0.35 | $0.49 |
| Fallout | 746 | Uncommon | — | $2.99 |
One ruling from Wizards of the Coast
- 13 July 2018The second part of Heroic Reinforcements's effect affects only creatures you control at the time it's applied, including the tokens created by the first part of its effect. Creatures you begin to control later in the turn won't get +1/+1 or gain haste.