Spawnbroker 
Creature — Human Wizard
$0.33 #20326 0.80 20.9 years
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.
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Cards similar to Spawnbroker expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Kitsune, Dragon's Daughter83%
$0.29↓#173320.00↓0.5 years↓
"Whenever this card enters or deals combat damage to a player, you may exchange control of two other target creatures controlled by different players."
Switcheroo83%
$0.16↓#14282↑0.64↓14.1 years↓
"Exchange control of two target creatures."
Gilded Drake82%
$208.84↑#2659↑1.48↑27.9 years↑
"When this creature enters, exchange control of this creature and up to one target creature an opponent controls. If you don't or can't make an exchange, sacrifice this creature. This ability still resolves if its target becomes illegal."
Connive // Concoct81%
$0.19↓#9344↑0.44↓7.9 years↓
"Gain control of target creature with power 2 or less."
Cultural Exchange81%
$4.56↑#12609↑0.63↓24.9 years↑
"Choose any number of creatures target player controls. Choose the same number of creatures another target player controls. Those players exchange control of those creatures."
Chromeshell Crab80%
$0.28↓#9481↑0.06↓23.6 years↑
"When this creature is turned face up, you may exchange control of target creature you control and target creature an opponent controls."
Vodalian Mindsinger80%
$0.15↓#27408↓0.00↓4.0 years↓
"When this creature enters, gain control of target creature with power less than this creature's power for as long as you control this creature."
Shrewd Negotiation79%
$0.09↓#24831↓0.50↓9.9 years↓
"Exchange control of target artifact you control and target artifact or creature you don't control."
Modify Memory79%
$0.16↓#7920↑0.22↓4.2 years↓
"Exchange control of two target creatures controlled by different players. If you control neither creature, draw three cards."
Rangers of Ithilien78%
$0.26↓#15959↑0.32↓3.2 years↓
"When this creature enters, gain control of up to one target creature with lesser power for as long as you control this creature. Then the Ring tempts you."
Old Man of the Sea78%
$228.67↑#25932↓1.00↑32.7 years↑
"
: Gain control of target creature with power less than or equal to this creature's power for as long as this creature remains tapped and that creature's power remains less than or equal to this creature's power."
: Gain control of target creature with power less than or equal to this creature's power for as long as this creature remains tapped and that creature's power remains less than or equal to this creature's power."
Trade the Helm78%
$0.18↓#16166↑0.51↓1.6 years↓
"Exchange control of target artifact or creature you control and target artifact or creature an opponent controls."
Djinn of Infinite Deceits77%
$0.74↑#14533↑0.24↓12.8 years↓
": Exchange control of two target nonlegendary creatures. You can't activate this ability during combat."
: Exchange control of two target nonlegendary creatures. You can't activate this ability during combat."
Legerdemain76%
$0.21↓#15364↑0.40↓28.9 years↑
"Exchange control of target artifact or creature and another target permanent that shares one of those types with it."
The Trickster-God's Heist76%
$0.18↓#11499↑1.06↑5.6 years↓
"You may exchange control of two target creatures."
Beguiler of Wills74%
$2.30↑#11905↑0.50↓14.6 years↓
": Gain control of target creature with power less than or equal to the number of creatures you control."
: Gain control of target creature with power less than or equal to the number of creatures you control."
Visions of Duplicity74%
$0.31↓#171870.56↓4.9 years↓
"Exchange control of two target creatures you don't control."
Vedalken Plotter74%
$0.41↑#12448↑0.30↓20.6 years
"When this creature enters, exchange control of target land you control and target land an opponent controls."
Order of Succession74%
$0.47↑#167990.7312.8 years↓
"Choose left or right. Starting with you and proceeding in the chosen direction, each player chooses a creature controlled by the next player in that direction. Each player gains control of the creature they chose."
Oko, Thief of Crowns73%
$4.82↑#2110↑1.71↑6.9 years↓
"−5: Exchange control of target artifact or creature you control and target creature an opponent controls with power 3 or less."