Arbor Adherent {3}{G}
Creature — Dog Druid
{T}: Add one mana of any color.
{T}: Add X mana of any one color, where X is the greatest toughness among other creatures you control.
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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.
White Lotus Tile 94%
$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."
The Legend of Kyoshi // Avatar Kyoshi 90%
$5.49#3451
"{T}: Add X mana of any one color, where X is the greatest power among creatures you control."
Mona Lisa, Science Geek 83%
$0.30#7161
"{T}: Add X mana of any one color, where X is this card's power."
Doc Samson, Super Psychiatrist 83%
$0.27#14867
"{T}: Add X mana of any one color, where X is this card's power."
Harabaz Druid 83%
$9.15#6708
"{T}: Add X mana of any one color, where X is the number of Allies you control."
Redshift, Rocketeer Chief 82%
$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."