Spitting Dilophosaurus 
Creature — Dinosaur
$26.78 #5609 0.78 2.8 years
Whenever this creature enters or attacks, put a -1/-1 counter on up to one target creature.
Creatures your opponents control with -1/-1 counters on them can't block.
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Cards similar to Spitting Dilophosaurus 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.
Banewhip Punisher87%
$0.29↓#10977↓0.00↓9.1 years↑
"When this creature enters, you may put a -1/-1 counter on target creature."
Hapatra, Vizier of Poisons84%
$0.28↓#3936↑0.50↓9.4 years↑
"Whenever this card deals combat damage to a player, you may put a -1/-1 counter on target creature."
Cultbrand Cinder82%
$0.11↓#30299↓0.00↓18.3 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender82%
$0.17↓#57380.40↓15.9 years↑
"When this creature enters, put three -1/-1 counters on target creature."
Grief Tyrant82%
$0.16↓#25986↓0.42↓18.3 years↑
"This creature enters with four -1/-1 counters on it."
Merciless Javelineer81%
$0.15↓#21073↓0.20↓9.4 years↑
", Discard a card: Put a -1/-1 counter on target creature. That creature can't block this turn."
, Discard a card: Put a -1/-1 counter on target creature. That creature can't block this turn."
Blowfly Infestation81%
$0.37↓#3092↑0.29↓18.3 years↑
"Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature."
Soulstinger80%
$0.12↓#19695↓0.00↓9.4 years↑
"When this creature enters, put two -1/-1 counters on target creature you control."
Gnarled Effigy79%
$0.18↓#27488↓0.24↓18.3 years↑
"
, 
: Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Obelisk Spider78%
$3.17↓#48440.06↓9.1 years↑
"Whenever this creature deals combat damage to a creature, put a -1/-1 counter on that creature."
Sludge Monster78%
$0.61↓#3977↑0.55↓4.9 years↑
"Whenever this creature enters or attacks, put a slime counter on up to one other target creature."
Crippling Blight78%
$0.09↓#19530↓0.50↓14.1 years↑
"Enchanted creature gets -1/-1 and can't block."
Liliana, Death Wielder77%
$0.40↓#7954↓0.729.4 years↑
"+2: Put a -1/-1 counter on up to one target creature."
+1 more matching line
Scar77%
$0.23↓#19614↓0.29↓18.3 years↑
"Put a -1/-1 counter on target creature."
Decimator Beetle76%
$0.10↓#18341↓0.00↓9.4 years↑
"Whenever this creature attacks, remove a -1/-1 counter from target creature you control and put a -1/-1 counter on up to one target creature defending player controls."
Volrath, the Shapestealer76%
$0.68↓#13602↓0.50↓7.0 years↑
"At the beginning of combat on your turn, put a -1/-1 counter on up to one target creature."
Lockjaw Snapper76%
$1.11↓#15839↓0.29↓18.3 years↑
"Wither"
+1 more matching line
Dread Tiller76%
$0.25↓#61330.00↓0.6 years↓
"When this creature enters, put a -1/-1 counter on target creature."
Crumbling Ashes76%
$27.70↑#67090.7918.1 years↑
"At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it."
Weed-Pruner Poplar76%
$0.15↓#26274↓0.29↓18.6 years↑
"At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn."