Jar of Eyeballs 
Artifact
$0.23 #19032 0.07 14.6 years
Whenever a creature you control dies, put two eyeball counters on this artifact.
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Cards similar to Jar of Eyeballs 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.
Osai Vultures80%
$0.13↓#29057↓0.1232.3 years↑
"At the beginning of each end step, if a creature died this turn, put a carrion counter on this creature."
Quest for the Gravelord78%
$0.13↓#173050.0616.9 years↑
"Whenever a creature dies, you may put a quest counter on this enchantment."
Staff of the Storyteller78%
$0.43↑#3129↑0.17↑3.6 years↓
"Whenever you create one or more creature tokens, put a story counter on this artifact."
Norn's Wellspring74%
$0.28↑#7142↑0.47↑3.6 years↓
"Whenever a creature you control dies, scry 1 and put an oil counter on this artifact."
Magnanimous Magistrate74%
$0.12↓#24594↓0.003.8 years↓
"Whenever another nontoken creature you control dies, if its mana value was 1 or greater, you may remove that many reprieve counters from this creature. If you do, return that card to the battlefield under its owner's control."
The Mana Rig73%
$0.47↑#175430.35↑4.0 years↓
"

,
: Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order."
Chainsaw73%
$1.04↑#3796↑0.18↑1.9 years↓
"Whenever one or more creatures die, put a rev counter on this Equipment."
Scavenging Ghoul72%
$0.17↓#30633↓0.60↑33.1 years↑
"At the beginning of each end step, put a corpse counter on this creature for each creature that died this turn."
Malefic Scythe72%
$0.14↓#187200.006.2 years↓
"Whenever equipped creature dies, put a soul counter on this Equipment."
Charforger72%
$0.11↓#206470.30↑3.6 years↓
"Whenever another creature or artifact you control is put into a graveyard from the battlefield, put an oil counter on this creature."
Browse72%
$0.19↓#30284↓0.29↑30.2 years↑
"

: Look at the top five cards of your library, put one of them into your hand, and exile the rest."
Anticipate72%
$0.05↓#6393↑0.50↑11.7 years↓
"Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order."
Impulse72%
$0.13↓#2620↑0.0929.6 years↑
"Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order."
Merchant's Dockhand72%
$0.12↓#200010.129.6 years↓
"
,
, Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order."
Stock Up71%
$1.31↑#1327↑0.26↑1.6 years↓
"Look at the top five cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order."
Experimental Augury71%
$0.21↓#1323↑0.153.6 years↓
"Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. Proliferate."
Crowded Crypt70%
$0.42↑#2421↑0.054.9 years↓
"Whenever a creature you control dies, put a corpse counter on this artifact."
Dovin, Grand Arbiter70%
$0.39↑#152450.35↑7.6 years↓
"−7: Look at the top ten cards of your library. Put three of them into your hand and the rest on the bottom of your library in a random order."
Arcane Investigator70%
$0.20↓#166270.29↑5.1 years↓
"Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order."