Thieves' Guild Enforcer 
Creature — Human Rogue
Flash
Whenever this creature or another Rogue you control enters, each opponent mills two cards.
As long as an opponent has eight or more cards in their graveyard, this creature gets +2/+1 and has deathtouch.
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Cards that do something similar 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.
Aven Heartstabber 82%
$0.26#12759
"As long as there are five or more mana values among cards in your graveyard, this creature gets +2/+2 and has deathtouch."
Dreadwing Scavenger 82%
$0.21#11077
"This creature gets +1/+1 and has deathtouch as long as there are seven or more cards in your graveyard."