Deathbloom Ritualist {3}{B}{G}
Creature — Elf Warlock
{T}: Add X mana of any one color, where X is the number of creature cards in 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.
Matzalantli, the Great Door // The Core 87%
$2.83#1742
"{T}: Add X mana of any one color, where X is the number of permanent cards in your graveyard."
White Lotus Tile 82%
$4.15#4330
"{T}: Add X mana of any one color, where X is the greatest number of creatures you control that have a creature type in common."
Redshift, Rocketeer Chief 80%
$0.27#9524
"{T}: Add X mana of any one color, where X is this card's power. Spend this mana only to activate abilities."
Doc Samson, Super Psychiatrist 80%
$0.27#14867
"{T}: Add X mana of any one color, where X is this card's power."
Mona Lisa, Science Geek 80%
$0.30#7161
"{T}: Add X mana of any one color, where X is this card's power."