Cheapest priced copy (Ravnica: City of Guilds): $0.69 at Card Kingdom, near mint, their price list as of .
Spawnbroker 
Creature — Human Wizard · 1/1 · Rare · Ravnica: City of Guilds · #65
When this creature enters, you may exchange control of target creature you control and target creature with power less than or equal to that creature's power an opponent controls.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.69 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: City of Guilds | 65 | Rare | $0.69 | $1.99Out of stock |
One ruling from Wizards of the Coast
- 1 October 2005If either target becomes illegal (say, if a creature’s power has changed such that the creature you control now has less power than the other creature), then the exchange won’t happen.