Library of Leng 
Artifact
$3.24 #2994 0.51 33.2 years
You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.
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Cards similar to Library of Leng 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.
Graceful Adept89%
$0.54↓#14920↓0.00↓22.1 years↓
"You have no maximum hand size."
Reliquary Tower86%
$4.15↑#10↑0.21↓17.7 years↓
"You have no maximum hand size."
Spellbook84%
$2.77↓#1916↑0.11↓28.3 years↓
"You have no maximum hand size."
Venser's Journal83%
$8.90↑#1981↑0.24↓16.1 years↓
"You have no maximum hand size."
Thought Vessel82%
$2.40↓#21↑0.00↓10.9 years↓
"You have no maximum hand size."
Reed Richards, Smartest Man80%
$0.58↓#12965↓0.610.3 years↓
"You have no maximum hand size."
Niv-Mizzet, Visionary80%
$6.47↑#2169↑1.06↑1.9 years↓
"You have no maximum hand size."
Proft's Eidetic Memory80%
$2.11↓#1739↑0.29↓2.7 years↓
"You have no maximum hand size."
Vnwxt, Verbose Host80%
$0.39↓#32720.25↓1.7 years↓
"You have no maximum hand size."
Minamo Scrollkeeper80%
$0.07↓#27258↓0.11↓21.4 years↓
"Your maximum hand size is increased by one."
Roaring Furnace // Steaming Sauna79%
$0.33↓#7082↓0.14↓2.1 years↓
"You have no maximum hand size."
Triskaidekaphile79%
$0.85↓#1478↑0.40↓5.1 years↓
"You have no maximum hand size."
Wizard Class79%
$2.96↓#636↑0.18↓5.2 years↓
"You have no maximum hand size."
Curiosity Crafter79%
$0.31↓#1694↑0.20↓5.5 years↓
"You have no maximum hand size."
Decanter of Endless Water78%
$2.55↓#326↑0.00↓4.4 years↓
"You have no maximum hand size."
Morska, Undersea Sleuth78%
$0.21↓#8992↓0.36↓2.7 years↓
"You have no maximum hand size."
Tishana, Voice of Thunder77%
$0.38↓#5590↓0.11↓9.1 years↓
"You have no maximum hand size."
Ms. Marvel, Kamala Khan76%
$0.28↓#14779↓0.28↓0.3 years↓
"You have no maximum hand size."
Kruphix, God of Horizons76%
$3.30↑#4840↓0.39↓12.5 years↓
"You have no maximum hand size."
Nyssa of Traken76%
$0.31↓#13579↓0.06↓3.0 years↓
"You have no maximum hand size."