Darksteel Colossus 
Artifact Creature — Golem
$0.99 #2457 0.53 22.6 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.
Nexus of Fate97%
$5.38↑#22951.57↑8.1 years↓
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."
Progenitus96%
$0.96↓#6607↓0.38↓17.6 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%
$34.26↑#1000↑1.88↑15.6 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 Weapon92%
$0.29↓#14992↓0.33↓25.3 years↑
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."
Purity88%
$2.55↑#16423↓0.42↓18.9 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Worldspine Wurm87%
$3.72↑#23670.35↓13.9 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Dread85%
$8.46↑#13063↓0.5318.9 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Serra Avatar84%
$0.45↓#7780↓0.69↑27.9 years↑
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Vigor84%
$2.67↑#1313↑0.68↑18.9 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
+1 more matching line
Hostility82%
$0.20↓#20401↓0.07↓18.9 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Gaea's Blessing82%
$0.30↓#5459↓0.24↓29.2 years↑
"When this card is put into your graveyard from your library, shuffle your graveyard into your library."
Angel of Fury80%
$7.72↑#30026↓0.4728.2 years↑
"When this creature dies, you may shuffle it into its owner's library."
Alabaster Dragon80%
$0.37↓#26081↓0.25↓29.3 years↑
"When this creature dies, shuffle it into its owner's library."
Ulamog, the Infinite Gyre79%
$35.03↑#1384↑1.69↑16.4 years↓
"When this card is put into a graveyard from anywhere, its owner shuffles their graveyard into their library."
+1 more matching line
Ilharg, the Raze-Boar79%
$8.20↑#24620.557.3 years↓
"Trample"
Kozilek, Butcher of Truth78%
$42.03↑#1124↑1.63↑16.4 years↓
"When this card is put into a graveyard from anywhere, its owner shuffles their graveyard into their library."
Guile76%
$0.80↓#11663↓0.64↑18.9 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Nissa's Chosen72%
$0.09↓#19088↓0.06↓16.9 years↓
"If this creature would die, put it on the bottom of its owner's library instead."
Gravebane Zombie72%
$0.14↓#28301↓0.27↓29.9 years↑
"If this creature would die, put it on top of its owner's library instead."