Necrotic Ooze 
Creature — Ooze
$2.41 #4599 0.37 15.9 years
As long as this creature is on the battlefield, it has all activated abilities of all creature cards in all graveyards.
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Cards similar to Necrotic 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.
Mirran Safehouse88%
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"As long as this artifact is on the battlefield, it has all activated abilities of all land cards in all graveyards."
Trazyn the Infinite80%
$1.71↓#10122↓0.56↑3.9 years↓
"As long as Trazyn is on the battlefield, it has all activated abilities of all artifact cards in your graveyard."
Experiment Kraj79%
$0.40↓#10652↓0.88↑20.3 years↑
"this card has all activated abilities of each other creature with a +1/+1 counter on it."
Marvin, Murderous Mimic79%
$3.37↑#1090↑0.471.9 years↓
"this card has all activated abilities of creatures you control that don't have the same name as this creature."
Manascape Refractor78%
$1.55↓#11011↓0.56↑6.4 years↓
"This artifact has all activated abilities of all lands on the battlefield."
Koh, the Face Stealer75%
$0.36↓#9664↓0.00↓0.8 years↓
"this card has all activated and triggered abilities of the last chosen card."
Quicksilver Elemental75%
$20.07↑#7905↓0.60↑22.9 years↑
"
: This creature gains all activated abilities of target creature until end of turn."
: This creature gains all activated abilities of target creature until end of turn."
Patchwork Crawler74%
$0.14↓#20190↓0.11↓4.8 years↓
"This creature has all activated abilities of all creature cards exiled with it."
Sharkey, Tyrant of the Shire74%
$0.24↓#20044↓0.383.2 years↓
"this card has all activated abilities of lands your opponents control except mana abilities."
Dark Impostor74%
$0.35↓#10818↓0.2914.3 years↓
"This creature has all activated abilities of all creature cards exiled with it."
Robaran Mercenaries72%
$0.26↓#17711↓0.444.0 years↓
"This creature has all activated abilities of all legendary creatures you control."
Thranduil, the Elvenking71%
$0.96↓#12517↓0.00↓0.1 years↓
"this card has all activated abilities of all Elf cards in your graveyard."
Skill Borrower70%
$0.34↓#24656↓0.95↑17.9 years↑
"As long as the top card of your library is an artifact or creature card, this creature has all activated abilities of that card."