Fellwar Stone 
Artifact
$0.80 #17 0.18 32.1 years
: Add one mana of any color that a land an opponent controls could produce.Click a line or tag to filter
Cards similar to Fellwar Stone 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.
Manalith88%
$0.17↓#7113↓0.00↓15.1 years↓
": Add one mana of any color."
: Add one mana of any color."
Sceptre of Eternal Glory88%
$20.02↑#2326↓0.103.9 years↓
": Add one mana of any color."
: Add one mana of any color."
Prismatic Lens88%
$0.26↓#1654↓0.40↑19.9 years↓
"
, : Add one mana of any color."
, : Add one mana of any color."
Sol Grail87%
$0.29↓#24614↓0.2130.2 years↓
": Add one mana of the chosen color."
: Add one mana of the chosen color."
Charcoal Diamond86%
$0.26↓#692↓0.00↓29.9 years↓
": Add 
."
: Add ."
Gilded Lotus86%
$0.53↓#411↓0.06↓22.9 years↓
": Add three mana of any one color."
: Add three mana of any one color."
Firemind Vessel84%
$0.18↓#4236↓0.29↑7.3 years↓
": Add two mana of different colors."
: Add two mana of different colors."
Mana Prism84%
$0.18↓#24925↓0.00↓29.9 years↓
", : Add one mana of any color."
, : Add one mana of any color."
Star Compass83%
$0.32↓#4698↓0.00↓25.6 years↓
": Add one mana of any color that a basic land you control could produce."
: Add one mana of any color that a basic land you control could produce."
Bender's Waterskin83%
$1.18↑#593↓0.00↓0.8 years↓
": Add one mana of any color."
: Add one mana of any color."
Coalition Relic80%
$0.38↓#3462↓0.2319.3 years↓
": Add one mana of any color."
: Add one mana of any color."
Wickersmith's Tools79%
$0.14↓#8727↓0.00↓0.6 years↓
": Add one mana of any color."
: Add one mana of any color."
Hot Dog Cart78%
$0.28↓#6373↓0.54↑1.0 years↓
": Add one mana of any color."
: Add one mana of any color."
Khalni Gem77%
$0.26↓#16216↓0.67↑16.9 years↓
": Add two mana of any one color."
: Add two mana of any one color."
Skull of Ramos77%
$2.22↑#19947↓0.2426.9 years↓
": Add ."
: Add ."
Chromatic Lantern76%
$0.98↑#85↓0.00↓13.9 years↓
": Add one mana of any color."
: Add one mana of any color."
Honored Heirloom76%
$0.20↓#8378↓0.40↑4.8 years↓
": Add one mana of any color."
: Add one mana of any color."
Mana Geode75%
$0.25↓#6921↓0.05↓7.3 years↓
": Add one mana of any color."
: Add one mana of any color."
Elementalist's Palette75%
$0.26↓#4003↓0.00↓5.4 years↓
": Add one mana of any color."
: Add one mana of any color."
Letter of Acceptance75%
$0.12↓#9499↓0.00↓5.4 years↓
": Add one mana of any color."
: Add one mana of any color."