Oaken Siren 
Artifact Creature — Siren Pirate
$0.26 #10702 0.06 2.8 years
Flying, vigilance
: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact source.Click a line or tag to filter
Cards similar to Oaken Siren 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.
Guidelight Optimizer96%
$0.21↓#110260.21↑1.6 years↓
": Add . Spend this mana only to cast an artifact spell or activate an ability."
: Add . Spend this mana only to cast an artifact spell or activate an ability."
Steelswarm Operator95%
$0.23↓#92620.081.1 years↓
": Add . Spend this mana only to activate abilities of artifact sources."
: Add . Spend this mana only to activate abilities of artifact sources."
Automated Artificer95%
$0.20↓#90070.40↑4.5 years↑
": Add 
. Spend this mana only to activate an ability or cast an artifact spell."
: Add . Spend this mana only to activate an ability or cast an artifact spell."
Purple Dragon Punks95%
$0.09↓#21801↓0.000.5 years↓
": Add 
. Spend this mana only to cast an artifact spell or to activate an ability."
: Add . Spend this mana only to cast an artifact spell or to activate an ability."
Soldevi Machinist94%
$0.26#27664↓0.0031.3 years↑
": Add . Spend this mana only to activate abilities of artifacts."
: Add . Spend this mana only to activate abilities of artifacts."
Mishra's Workshop92%
$3249.99↑#3810↑1.55↑32.5 years↑
": Add . Spend this mana only to cast artifact spells."
: Add . Spend this mana only to cast artifact spells."
Hargilde, Kindly Runechanter92%
$0.37↑#16908↓0.004.9 years↑
": Add . Spend this mana only to cast artifact spells or activate abilities of artifacts."
: Add . Spend this mana only to cast artifact spells or activate abilities of artifacts."
Vedalken Engineer92%
$0.17↓#5982↑0.22↑22.6 years↑
": Add two mana of any one color. Spend this mana only to cast artifact spells or activate abilities of artifacts."
: Add two mana of any one color. Spend this mana only to cast artifact spells or activate abilities of artifacts."
Humble Naturalist90%
$0.20↓#17013↓0.48↑6.4 years↑
": Add one mana of any color. Spend this mana only to cast a creature spell."
: Add one mana of any color. Spend this mana only to cast a creature spell."
Somberwald Sage88%
$0.59↑#2559↑0.20↑14.3 years↑
": Add three mana of any one color. Spend this mana only to cast creature spells."
: Add three mana of any one color. Spend this mana only to cast creature spells."
Beastcaller Savant88%
$0.49↑#4977↑0.25↑10.9 years↑
": Add one mana of any color. Spend this mana only to cast a creature spell."
: Add one mana of any color. Spend this mana only to cast a creature spell."
Dalakos, Crafter of Wonders88%
$0.36↑#7058↑0.006.6 years↑
": Add . Spend this mana only to cast artifact spells or activate abilities of artifacts."
: Add . Spend this mana only to cast artifact spells or activate abilities of artifacts."
Omen Hawker86%
$0.36↑#5016↑0.003.4 years
": Add . Spend this mana only to activate abilities."
: Add . Spend this mana only to activate abilities."
Renowned Weaponsmith86%
$0.08↓#14796↓0.16↑11.6 years↑
": Add . Spend this mana only to cast artifact spells or activate abilities of artifacts."
: Add . Spend this mana only to cast artifact spells or activate abilities of artifacts."
Lotus Guardian84%
$0.54↑#25528↓0.57↑25.9 years↑
"Flying"
Birds of Paradise84%
$9.45↑#34↑0.31↑33.1 years↑
"Flying"
Cargo Ship84%
$0.20↓#108800.18↑1.2 years↓
": Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact source."
: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact source."
Princess Lucrezia84%
$2.78↑#29926↓0.24↑32.3 years↑
": Add ."
: Add ."
Silver Myr84%
$0.44↑#1257↑0.0722.9 years↑
": Add ."
: Add ."
Warden of Geometries84%
$0.26#13376↓0.25↑10.6 years↑
": Add ."
: Add ."