Lost Days 

Instant — Lesson
$0.11 #11021 0.19 0.9 years
The owner of target creature or enchantment puts it into their library second from the top or on the bottom. You create a Clue token. (It's an artifact with "
, Sacrifice this token: Draw a card.")
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Cards similar to Lost Days 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.
Chronostutter85%
$0.13↑#30110↓0.07↓12.3 years↑
"Put target creature into its owner's library second from the top."
Isolation at Orthanc85%
$0.16↑#20763↓0.283.3 years↑
"Put target creature into its owner's library second from the top."
Mystic Repeal84%
$0.17↑#21490↓0.41↑6.7 years↑
"Put target enchantment on the bottom of its owner's library."
Revenge of the Drowned83%
$0.15↑#22271↓0.205.1 years↑
"Target creature's owner puts it on their choice of the top or bottom of their library. You create a 2/2 black Zombie creature token with decayed."
Misleading Motes82%
$0.06↓#26849↓0.06↓3.1 years↑
"Target creature's owner puts it on their choice of the top or bottom of their library."
Return to the Sewers81%
$0.12↑#21331↓0.190.6 years
"Target creature's owner puts it on their choice of the top or bottom of their library. You create a Mutagen token."
Aura Extraction81%
$0.28↑#25246↓0.2924.0 years↑
"Put target enchantment on top of its owner's library."
Happy Hogan, Bodyguard80%
$0.19↑#29154↓0.260.3 years
"When this card enters, the owner of target creature an opponent controls puts it into their library second from the top or on the bottom."
Banishment Decree80%
$0.06↓#29620↓0.2115.7 years↑
"Put target artifact, creature, or enchantment on top of its owner's library."
Bury in Books80%
$0.08↓#20988↓0.115.5 years↑
"Put target creature into its owner's library second from the top."
Banishing Stroke79%
$0.11#17427↓0.07↓14.5 years↑
"Put target artifact, creature, or enchantment on the bottom of its owner's library."
Run Behind78%
$0.09↓#22873↓0.08↓0.5 years
"Target creature's owner puts it on their choice of the top or bottom of their library."
Uncharted Voyage78%
$0.08↓#17969↓0.00↓1.9 years↑
"Target creature's owner puts it on their choice of the top or bottom of their library."
Uneasy Partings78%
$0.07↓#24266↓0.130.2 years
"Target creature's owner puts it on their choice of the top or bottom of their library."