Sigil of Myrkul 
Enchantment
$0.23 #17000 0.56 4.2 years
At the beginning of combat on your turn, mill a card. When you do, if there are four or more creature cards in your graveyard, put a +1/+1 counter on target creature you control and it gains deathtouch until end of turn. (To mill a card, put the top card of your library into your graveyard.)
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Cards similar to Sigil of Myrkul 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.
Grave Strength81%
$0.09↓#169300.07↓11.6 years↑
"Choose target creature. Mill three cards, then put a +1/+1 counter on that creature for each creature card in your graveyard."
Siegfried, Famed Swordsman71%
$0.19↓#7544↑0.21↓1.2 years↓
"When this card enters, mill three cards. Then put X +1/+1 counters on this card, where X is twice the number of creature cards in your graveyard."
Moldgraf Millipede71%
$0.12↓#9421↑0.35↓4.8 years
"When this creature enters, mill three cards, then put a +1/+1 counter on this creature for each creature card in your graveyard."
Gixian Skullflayer70%
$0.18↓#192150.22↓3.8 years
"At the beginning of your upkeep, if there are three or more creature cards in your graveyard, put a +1/+1 counter on this creature."