Predator Ooze 
Creature — Ooze
$0.24 #6274 0.31 14.7 years
Indestructible (Damage and effects that say "destroy" don't destroy this creature.)
Whenever this creature attacks, put a +1/+1 counter on it.
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.
Click a line or tag to filter
Cards similar to Predator Ooze 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.
Sengir Vampire98%
$0.07↓#18540↓0.00↓33.2 years↑
"Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Sengir Bats98%
$0.15↓#27196↓0.21↓31.1 years↑
"Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Vampiric Dragon96%
$0.31↑#20144↓0.00↓25.1 years↑
"Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Blood Cultist96%
$0.33↑#17384↓0.12↓18.0 years↑
"Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Vampiric Embrace90%
$0.33↑#27191↓0.05↓28.0 years↑
"Whenever a creature dealt damage by enchanted creature this turn dies, put a +1/+1 counter on that creature."
Vein Drinker89%
$0.25↑#21974↓0.11↓18.0 years↑
"Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Garza Zol, Plague Queen89%
$2.27↑#28418↓0.00↓20.2 years↑
"Whenever a creature dealt damage by this card this turn dies, put a +1/+1 counter on this card."
Repentant Vampire88%
$0.52↑#29849↓0.2725.1 years↑
"Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Trophy Hunter88%
$0.29↑#23769↓0.2221.0 years↑
"Whenever a creature with flying dealt damage by this creature this turn dies, put a +1/+1 counter on this creature."
Baron Sengir88%
$5.37↑#24907↓0.05↓31.1 years↑
"Whenever a creature dealt damage by this card this turn dies, put a +2/+2 counter on this card."
Zurgo Helmsmasher86%
$0.53↑#10917↓0.17↓12.1 years↓
"Whenever a creature dealt damage by Zurgo this turn dies, put a +1/+1 counter on Zurgo."
+1 more matching line
Vampiric Sliver83%
$1.05↑#21016↓0.06↓20.0 years↑
"All Sliver creatures have "Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.""
Resplendent Griffin80%
$0.11↓#28706↓0.00↓8.8 years↓
"Whenever this creature attacks, if you have the city's blessing, put a +1/+1 counter on it."
Rubblebelt Raiders80%
$0.13↓#18863↓0.00↓13.7 years
"Whenever this creature attacks, put a +1/+1 counter on it for each attacking creature you control."
Ezio, Brash Novice80%
$0.21↓#13012↓0.18↓2.3 years↓
"Whenever this card attacks, put a +1/+1 counter on it."
Lumberknot80%
$0.12↓#15549↓0.00↓15.1 years
"Whenever a creature dies, put a +1/+1 counter on this creature."
Sapling of Colfenor80%
$6.01↑#67110.06↓18.2 years↑
"Indestructible"
Algae Gharial79%
$0.11↓#22219↓0.19↓18.0 years↑
"Whenever another creature dies, you may put a +1/+1 counter on this creature."
Darksteel Sentinel79%
$0.30↑#16088↓0.06↓16.1 years↑
"Indestructible"
Darksteel Myr79%
$1.06↑#67540.00↓16.1 years↑
"Indestructible"