Reflecting Pool
Land
{T}: Add one mana of any type that a land you control could produce.
click a line to search just that ability, click more to combine them
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.
Cactus Preserve 100%
$5.15#3709
"{T}: Add one mana of any type that a land you control could produce."
Naga Vitalist 100%
$0.17#13439
"{T}: Add one mana of any type that a land you control could produce."
Incubation Druid 88%
$2.61#650
"{T}: Add one mana of any type that a land you control could produce. If this creature has a +1/+1 counter on it, add three mana of that type instead."
Harvester Druid 84%
$0.24#20024
"{T}: Add one mana of any color that a land you control could produce."
Star Compass 83%
$0.61#4644
"{T}: Add one mana of any color that a basic land you control could produce."
Sylvok Explorer 80%
$0.33#22488
"{T}: Add one mana of any color that a land an opponent controls could produce."
Fellwar Stone 80%
$0.71#17
"{T}: Add one mana of any color that a land an opponent controls could produce."
Quirion Explorer 80%
$0.28#18317
"{T}: Add one mana of any color that a land an opponent controls could produce."