Kozilek, Butcher of Truth 
Legendary Creature — Eldrazi
$42.54 #1108 1.55 16.5 years
When you cast this spell, draw four cards.
Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents of their choice.)
When Kozilek is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.
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Cards similar to Kozilek, Butcher of Truth 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.
Ulamog, the Infinite Gyre99%
$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
Nulldrifter88%
$1.31↓#2511↓0.40↓2.3 years↓
"When you cast this spell, draw two cards."
+1 more matching line
Artisan of Kozilek86%
$0.44↓#12110.75↓16.5 years
"Annihilator 2"
Pathrazer of Ulamog84%
$2.03↓#2374↓0.89↓16.5 years
"Annihilator 3"
Ulamog's Crusher84%
$0.24↓#3449↓0.73↓16.5 years
"Annihilator 2"
Legacy Weapon82%
$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."
Flayer of Loyalties82%
$13.47↓#3203↓1.15↓3.2 years↓
"Annihilator 2"
Purity80%
$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."
Dread80%
$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."
Breaker of Creation80%
$0.32↓#3924↓1.03↓2.3 years↓
"Annihilator 2"
It That Betrays80%
$11.12↓#1557↓1.6216.5 years
"Annihilator 2"
Worldspine Wurm80%
$4.28↓#2422↓0.43↓14.0 years↓
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Gaea's Blessing80%
$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."
+1 more matching line
Eldrazi Ravager78%
$0.25↓#9977↓0.43↓2.3 years↓
"Annihilator 1"
Hand of Emrakul78%
$0.39↓#12836↓0.50↓16.5 years
"Annihilator 1"
Serra Avatar78%
$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."
Vigor78%
$1.86↓#13200.75↓19.0 years↑
"When this card is put into a graveyard from anywhere, shuffle it into its owner's library."
Hostility78%
$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."
Spawnsire of Ulamog78%
$9.35↓#11721↓0.66↓16.5 years
"Annihilator 1"
Darksteel Colossus77%
$0.85↓#2310↓0.55↓22.7 years↑
"If this card would be put into a graveyard from anywhere, reveal this card and shuffle it into its owner's library instead."