Spitting Dilophosaurus 
Creature — Dinosaur
$25.70 #5728 0.40 2.9 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%
$0.25↓#11192↓0.06↓9.3 years↑
"When this creature enters, you may put a -1/-1 counter on target creature."
Hapatra, Vizier of Poisons84%
$0.26↓#3862↑0.349.5 years↑
"Whenever this card deals combat damage to a player, you may put a -1/-1 counter on target creature."
Cultbrand Cinder82%
$0.11↓#30659↓0.00↓18.5 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender82%
$0.23↓#56920.69↑16.1 years↑
"When this creature enters, put three -1/-1 counters on target creature."
Grief Tyrant82%
$0.15↓#26356↓0.06↓18.5 years↑
"This creature enters with four -1/-1 counters on it."
Merciless Javelineer81%
$0.17↓#21375↓0.11↓9.5 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%
$0.33↓#3048↑0.59↑18.5 years↑
"Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature."
Soulstinger80%
$0.18↓#20032↓0.18↓9.5 years↑
"When this creature enters, put two -1/-1 counters on target creature you control."
Gnarled Effigy79%
$0.15↓#27769↓0.07↓18.5 years↑
"
, 
: Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Obelisk Spider78%
$2.52↓#48230.22↓9.3 years↑
"Whenever this creature deals combat damage to a creature, put a -1/-1 counter on that creature."
Sludge Monster78%
$0.46↓#4093↑0.73↑5.1 years↑
"Whenever this creature enters or attacks, put a slime counter on up to one other target creature."
Crippling Blight78%
$0.10↓#19771↓0.26↓14.3 years↑
"Enchanted creature gets -1/-1 and can't block."
Liliana, Death Wielder77%
$0.39↓#7854↓0.07↓9.5 years↑
"+2: Put a -1/-1 counter on up to one target creature."
+1 more matching line
Decimator Beetle76%
$0.08↓#18733↓0.11↓9.5 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."
Lockjaw Snapper76%
$1.54↓#16140↓0.18↓18.5 years↑
"Wither"
+1 more matching line
Dread Tiller76%
$0.23↓#58760.19↓0.7 years↓
"When this creature enters, put a -1/-1 counter on target creature."
Crumbling Ashes76%
$24.83↓#67710.4318.2 years↑
"At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it."
Weed-Pruner Poplar76%
$0.14↓#26750↓0.12↓18.7 years↑
"At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn."
Blight Rot76%
$0.28↓#8917↓0.04↓0.7 years↓
"Put four -1/-1 counters on target creature."
The Scorpion God76%
$0.26↓#51050.25↓9.5 years↑
"
: Put a -1/-1 counter on another target creature."
: Put a -1/-1 counter on another target creature."