Bruvac the Grandiloquent 
Legendary Creature — Human Advisor
$41.00 #2125 1.55 6.3 years
If an opponent would mill one or more cards, they mill twice that many cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)
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Cards similar to Bruvac the Grandiloquent 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.
The Water Crystal86%
$3.59↓#1473↑0.78↓1.4 years↓
"If an opponent would mill one or more cards, they mill that many cards plus four instead."
Crawling Infestation77%
$0.24↓#4674↓0.10↓4.9 years↓
"At the beginning of your upkeep, you may mill two cards."
Dreadhound72%
$0.16↓#5831↓0.27↓5.1 years↓
"When this creature enters, mill three cards."
Glowing One71%
$1.49↓#4624↓0.56↓2.6 years↓
"Whenever a player mills a nonland card, you gain 1 life."