Cheapest priced copy (Fallen Empires): $1.29 at Card Kingdom, near mint, their price list as of .
Soul Exchange 
Sorcery · Uncommon · Fallen Empires · #43
As an additional cost to cast this spell, exile a creature you control.
Return target creature card from your graveyard to the battlefield. Put a +2/+2 counter on that creature if the exiled creature was a Thrull.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fallen Empires | 43 | Uncommon | $1.29 | — |
2 rulings from Wizards of the Coast
- 4 October 2004You exile exactly one creature. You can’t exile more than one in an attempt to get a larger effect.
- 4 October 2004Putting a counter on the creature put onto the battlefield is not a targeted effect and so Protection from Black will not prevent it.