Quest for Ancient Secrets 
Enchantment
$0.22 #18527 0.05 16.9 years
Whenever a card is put into your graveyard from anywhere, you may put a quest counter on this enchantment.
Remove five quest counters from this enchantment and sacrifice it: Target player shuffles their graveyard into their library.
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Cards similar to Quest for Ancient Secrets 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.
Quest for the Gravelord84%
$0.13↓#173050.0616.9 years
"Whenever a creature dies, you may put a quest counter on this enchantment."
+1 more matching line
Quest for the Gemblades80%
$0.18↓#25786↓0.0716.9 years
"Remove a quest counter from this enchantment and sacrifice it: Put four +1/+1 counters on target creature."
+1 more matching line
Reminisce79%
$0.16↓#185670.33↑23.9 years↑
"Target player shuffles their graveyard into their library."
Learn from the Past77%
$0.16↓#10590↑0.29↑11.4 years↓
"Target player shuffles their graveyard into their library."
Clear the Mind77%
$0.25↑#7187↑0.19↑7.6 years↓
"Target player shuffles their graveyard into their library."
Ior Ruin Expedition76%
$0.07↓#149410.0016.9 years
"Remove three quest counters from this enchantment and sacrifice it: Draw two cards."
+1 more matching line
Bloodchief Ascension75%
$14.21↑#752↑1.14↑16.9 years
"Whenever a card is put into an opponent's graveyard from anywhere, if this enchantment has three or more quest counters on it, you may have that player lose 2 life. If you do, you gain 2 life."
Sunspring Expedition74%
$0.08↓#185430.0416.9 years
"Remove three quest counters from this enchantment and sacrifice it: You gain 8 life."
+1 more matching line
Quest for the Holy Relic72%
$0.22#164880.28↑16.9 years
"Whenever you cast a creature spell, you may put a quest counter on this enchantment."
Quest for Pure Flame72%
$0.63↑#10250↑0.1416.9 years
"Whenever a source you control deals damage to an opponent, you may put a quest counter on this enchantment."
+1 more matching line
Mnemonic Nexus72%
$0.28↑#205360.1420.9 years↑
"Each player shuffles their graveyard into their library."
Vulturous Zombie71%
$0.32↑#163480.25↑20.9 years↑
"Whenever a card is put into an opponent's graveyard from anywhere, put a +1/+1 counter on this creature."
Soul Stair Expedition71%
$0.11↓#179890.0016.9 years
"Remove three quest counters from this enchantment and sacrifice it: Return up to two target creature cards from your graveyard to your hand."
+1 more matching line
Thran Foundry71%
$0.45↑#203990.0027.2 years↑
"
, 
, Exile this artifact: Target player shuffles their graveyard into their library."
, , Exile this artifact: Target player shuffles their graveyard into their library."