Darksteel Colossus 
Artifact Creature — Golem
$0.85 #2310 0.55 22.7 years
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Indestructible (Damage and effects that say "destroy" don't destroy this creature.)
If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.
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Cards similar to Darksteel Colossus 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.
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$0.92↑#6640↓0.5317.7 years↓
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."
Blightsteel Colossus96%
$33.89↑#958↑1.97↑15.7 years↓
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."
Nexus of Fate96%
$5.32↑#23151.58↑8.3 years↓
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."
Legacy Weapon90%
$0.31↓#15188↓0.31↓25.4 years↑
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."
Purity87%
$2.58↑#16478↓0.29↓19.0 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Worldspine Wurm86%
$4.28↑#24220.43↓14.0 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Dread84%
$8.46↑#13220↓0.35↓19.0 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Serra Avatar82%
$0.45↓#7691↓0.44↓28.0 years↑
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Vigor82%
$1.86↑#1320↑0.75↑19.0 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
+1 more matching line
Hostility81%
$0.21↓#20630↓0.40↓19.0 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Gaea's Blessing81%
$0.27↓#5505↓0.11↓29.4 years↑
"When this card is put into your graveyard from your library, shuffle your graveyard into your library."
Darksteel Sentinel81%
$0.30↓#16088↓0.06↓16.1 years↓
"Indestructible"
Darksteel Myr81%
$1.06↑#6754↓0.00↓16.1 years↓
"Indestructible"
Plated Crusher81%
$0.10↓#20824↓0.06↓11.0 years↓
"Trample"
Copper Host Crusher81%
$0.23↓#10781↓0.19↓3.5 years↓
"Trample"
Kodama of the North Tree81%
$0.98↑#22336↓0.06↓22.1 years
"Trample"
Ulamog, the Infinite Gyre80%
$34.99↑#1378↑1.78↑16.5 years↓
"When this card is put into a graveyard from anywhere, its owner shuffles their graveyard into their library."
+1 more matching line
Angel of Fury80%
$4.11↑#30081↓0.33↓28.3 years↑
"When this creature dies, you may shuffle it into its owner's library."
Alabaster Dragon80%
$0.38↓#26096↓0.00↓29.5 years↑
"When this creature dies, shuffle it into its owner's library."
Darksteel Gargoyle79%
$0.27↓#20908↓0.00↓22.7 years
"Indestructible"