Crystal Skull, Isu Spyglass 
Legendary Artifact
$2.08 #1971 0.86 2.2 years
You may look at the top card of your library any time.
You may play historic lands and cast historic spells from the top of your library. (Artifacts, legendaries, and Sagas are historic.)
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Cards similar to Crystal Skull, Isu Spyglass 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.
Zagoth Crystal88%
$0.17↓#15769↓0.00↓6.4 years↑
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Orazca Relic88%
$0.11↓#15605↓0.33↓8.6 years↑
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Verge Rangers87%
$0.25↓#5386↓0.16↓6.4 years↑
"You may look at the top card of your library any time."
The Lunar Whale85%
$0.31↓#11005↓0.34↓1.2 years
"You may look at the top card of your library any time."
+1 more matching line
Thundermane Dragon85%
$1.22↓#3647↓0.31↓1.4 years
"You may look at the top card of your library any time."
Assemble the Players85%
$0.34↓#4632↓0.21↓2.6 years
"You may look at the top card of your library any time."
+1 more matching line
Silumgar Monument85%
$0.21↓#20109↓0.00↓11.4 years↑
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Summoning Materia84%
$0.21↓#6588↓0.30↓1.2 years
"You may look at the top card of your library any time."
Galea, Kindler of Hope83%
$1.03↓#12454↓0.60↓5.1 years↑
"You may look at the top card of your library any time."
Chronatog Totem83%
$0.33↓#20542↓0.45↓19.9 years↑
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Dimir Locket83%
$0.20↓#8508↓0.05↓7.9 years↑
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Dimir Cluestone83%
$0.17↓#10676↓0.25↓13.3 years↑
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Simic Locket83%
$0.11↓#14607↓0.14↓7.6 years↑
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Simic Cluestone83%
$0.19↓#15469↓0.33↓13.3 years↑
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Izzet Locket82%
$0.20↓#8009↓0.00↓7.9 years↑
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Izzet Cluestone82%
$0.24↓#10510↓0.17↓13.3 years↑
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Sultai Banner82%
$0.12↓#16806↓0.27↓11.9 years↑
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Hakoda, Selfless Commander82%
$0.33↓#4639↓0.00↓0.8 years↓
"You may look at the top card of your library any time."
+1 more matching line
Drake-Skull Cameo82%
$0.21↓#23113↓0.00↓25.9 years↑
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Conversion Apparatus82%
$0.55↓#5942↓0.27↓2.2 years
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