Mind Drill Assailant {2}{U/B}{U/B}
Creature — Rat Warlock
Threshold — As long as there are seven or more cards in your graveyard, this creature gets +3/+0.
{2}{U/B}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
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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.
Werebear 87%
$0.22#8089
"This creature gets +3/+3 as long as there are seven or more cards in your graveyard."
Swimmer in Nightmares 86%
$0.25#28003
"This creature gets +3/+0 as long as there are ten or more cards in a single graveyard."
Krosan Beast 81%
$5.05#18711
"This creature gets +7/+7 as long as there are seven or more cards in your graveyard."
Metamorphic Wurm 81%
$0.19#26409
"This creature gets +4/+4 as long as there are seven or more cards in your graveyard."
Nantuko Calmer 81%
$0.25#27979
"This creature gets +1/+1 as long as there are seven or more cards in your graveyard."