Tranquilize 
Sorcery
$0.17 #13061 0.57 2.2 years
Tap target creature an opponent controls and put three stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
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Procrastinate99%
$0.20↑#134000.00↓0.4 years↓
"Tap target creature. Put twice X stun counters on it."
Rapier Wit96%
$0.20↑#16069↓0.00↓0.4 years↓
"Tap target creature. If it's your turn, put a stun counter on it."
Succumb to the Cold96%
$0.25↑#105550.14↓3.0 years
"Tap one or two target creatures an opponent controls. Put a stun counter on each of them."
Impede Momentum96%
$0.21↑#124590.38↓4.0 years↑
"Tap target creature and put three stun counters on it."
Shipwreck Patrol96%
$0.17#30233↓0.00↓0.2 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Alchemax Slayer-Bots96%
$0.22↑#18129↓0.17↓0.9 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Rowdy Snowballers96%
$0.17#139930.00↓0.8 years↓
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Fractal Mascot96%
$0.13↓#22595↓0.00↓0.4 years↓
"When this creature enters, tap target creature an opponent controls. Put a stun counter on it."
Fear of Immobility96%
$0.11↓#17042↓0.18↓1.9 years
"When this creature enters, tap up to one target creature. If an opponent controls that creature, put a stun counter on it."
Utrom Scientists96%
$0.13↓#22162↓0.00↓0.5 years↓
"When this creature enters, tap up to one target creature and put a stun counter on it."
Riverwheel Sweep95%
$0.19↑#20572↓0.24↓1.4 years
"Tap target creature. Put three stun counters on it."
Take into Custody95%
$0.05↓#23529↓0.27↓9.6 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Origin of Captain America94%
$0.31↑#25785↓0.00↓0.2 years↓
"Tap up to one target creature and put a stun counter on it."
Press for Answers94%
$0.05↓#20217↓0.11↓10.4 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Donatello, Rad Scientist94%
$0.38↑#18960↓0.00↓0.5 years↓
"When this card enters, tap up to three target creatures your opponents control. Put a stun counter on each of them."
Gilded Scuttler93%
$0.26↑#140550.15↓1.8 years
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Crippling Chill93%
$0.03↓#19745↓0.12↓14.3 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Constrictor Sage92%
$0.15↓#21475↓0.22↓1.4 years
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Solitary Sanctuary92%
$0.25↑#8424↑0.28↓3.0 years
"When this enchantment enters, tap target creature an opponent controls and put a stun counter on it."
Collector's Case92%
$0.16↓#27215↓0.00↓0.2 years↓
"When this artifact enters, tap up to one target creature and put two stun counters on it."