Donatello, Rad Scientist 
Legendary Creature — Mutant Ninja Turtle
$0.38 #18960 0.00 0.5 years
Vigilance (Attacking doesn't cause this creature to tap.)
When Donatello enters, tap up to three target creatures your opponents control. Put a stun counter on each of them. (If a permanent with a stun counter would become untapped, remove one from it instead.)
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Cards similar to Donatello, Rad Scientist 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.
Utrom Scientists97%
$0.13↓#221620.000.5 years
"When this creature enters, tap up to one target creature and put a stun counter on it."
Rowdy Snowballers97%
$0.17↓#13993↑0.000.8 years
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Shipwreck Patrol97%
$0.17↓#30233↓0.000.2 years
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Alchemax Slayer-Bots97%
$0.22↓#181290.17↑0.9 years
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Fractal Mascot97%
$0.13↓#225950.000.4 years
"When this creature enters, tap target creature an opponent controls. Put a stun counter on it."
Fear of Immobility97%
$0.11↓#170420.18↑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."
Succumb to the Cold96%
$0.25↓#10555↑0.14↑3.0 years↑
"Tap one or two target creatures an opponent controls. Put a stun counter on each of them."
Gilded Scuttler94%
$0.26↓#14055↑0.15↑1.8 years↑
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Collector's Case94%
$0.16↓#27215↓0.000.2 years
"When this artifact enters, tap up to one target creature and put two stun counters on it."
Tranquilize94%
$0.17↓#13061↑0.57↑2.2 years↑
"Tap target creature an opponent controls and put three stun counters on it."
Constrictor Sage93%
$0.15↓#214750.22↑1.4 years
"When this creature enters, tap target creature an opponent controls and put a stun counter on it."
Chillbringer93%
$0.05↓#26013↓0.067.6 years↑
"When this creature enters, tap target creature an opponent controls. It doesn't untap during its controller's next untap step."
Stitched Mangler93%
$0.11↓#210620.18↑10.4 years↑
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Kor Hookmaster93%
$0.05↓#25606↓0.13↑16.9 years↑
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Watertrap Weaver93%
$0.06↓#222060.53↑8.9 years↑
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
Frost Lynx93%
$0.04↓#197630.41↑12.1 years↑
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."
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."
Procrastinate92%
$0.20↓#13400↑0.000.4 years
"Tap target creature. Put twice X stun counters on it."
Dreamdew Entrancer92%
$0.32↓#6904↑0.47↑2.1 years↑
"When this creature enters, tap up to one target creature and put three stun counters on it. If you control that creature, draw two cards."
Frost Trickster92%
$0.10↓#175710.11↑5.4 years↑
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."