Sleeper Agent 
Creature — Phyrexian Minion
$1.69 #11715 0.20 27.9 years
When this creature enters, target opponent gains control of it.
At the beginning of your upkeep, this creature deals 2 damage to you.
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Cards similar to Sleeper Agent expected a card that isn't here?
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Witch Hunt95%
$0.38↓#16048↓0.2112.8 years↓
"At the beginning of your upkeep, this enchantment deals 4 damage to you."
+1 more matching line
Jinxed Idol94%
$1.02↓#94770.64↑28.9 years
"At the beginning of your upkeep, this artifact deals 2 damage to you."
+1 more matching line
Akroan Horse91%
$0.45↓#4451↑0.1112.9 years↓
"When this creature enters, an opponent gains control of it."
Jinxed Choker88%
$2.40↑#115230.45↑22.9 years↓
"At the beginning of your upkeep, this artifact deals damage to you equal to the number of charge counters on it."
+1 more matching line
Vislor Turlough85%
$0.24↓#123770.72↑2.9 years↓
"When this card enters, you may have an opponent gain control of it. If you do, it's goaded for as long as they control it."
Captive Audience84%
$4.24↑#7490↑1.00↑7.6 years↓
"This enchantment enters under the control of an opponent of your choice."
Crag Saurian83%
$0.45↓#28873↓0.33↑26.9 years
"Whenever a source deals damage to this creature, that source's controller gains control of this creature."
Jinxed Ring82%
$3.12↑#137720.2228.5 years
"Whenever a nontoken permanent is put into your graveyard from the battlefield, this artifact deals 1 damage to you."
+1 more matching line
Crown of Doom82%
$2.55↑#9056↑0.44↑11.8 years↓
"
: Target player other than this artifact's owner gains control of it. Activate only during your turn."
: Target player other than this artifact's owner gains control of it. Activate only during your turn."
Xantcha, Sleeper Agent80%
$1.30↓#3009↑0.41↑8.1 years↓
"this card enters under the control of an opponent of your choice."
Goblin Cadets78%
$2.15↑#119350.00↓27.9 years
"Whenever this creature blocks or becomes blocked, target opponent gains control of it."
Measure of Wickedness78%
$0.29↓#25536↓0.76↑21.3 years↓
"Whenever another card is put into your graveyard from anywhere, target opponent gains control of this enchantment."
+1 more matching line
Sky Swallower76%
$0.31↓#24898↓0.39↑20.6 years↓
"When this creature enters, target opponent gains control of all other permanents you control."
Harmless Offering76%
$0.16↓#5380↑0.48↑10.1 years↓
"Target opponent gains control of target permanent you control."
Risky Move76%
$1.22↓#119180.65↑23.9 years↓
"At the beginning of each player's upkeep, that player gains control of this enchantment."
Ghazbán Ogre76%
$0.11↓#30659↓0.2732.7 years↑
"At the beginning of your upkeep, if a player has more life than each other player, the player with the most life gains control of this creature."
Relic Robber76%
$0.24↓#14677↓0.155.9 years↓
"Whenever this creature deals combat damage to a player, that player creates a 0/1 colorless Goblin Construct artifact creature token with "This token can't block" and "At the beginning of your upkeep, this token deals 1 damage to you.""
Treacherous Pit-Dweller74%
$0.36↓#18417↓0.2514.3 years↓
"When this creature enters from a graveyard, target opponent gains control of it."
Abby, Merciless Soldier74%
$1.85↑#15657↓0.00↓0.9 years↓
"this card enters under the control of an opponent of your choice."
Wild Mammoth74%
$0.15↓#31085↓0.00↓26.6 years↓
"At the beginning of your upkeep, if a player controls more creatures than each other player, the player who controls the most creatures gains control of this creature."