Altar of the Lost 
Artifact
$0.06 #23650 0.19 14.7 years
This artifact enters tapped.
: Add two mana in any combination of colors. Spend this mana only to cast spells with flashback from a graveyard.Click a line or tag to filter
Cards similar to Altar of the Lost 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.
Rootcoil Creeper88%
$0.25↑#10268↑0.125.1 years↓
": Add two mana of any one color. Spend this mana only to cast spells from your graveyard."
: Add two mana of any one color. Spend this mana only to cast spells from your graveyard."
Worn Powerstone84%
$0.26↑#573↑0.00↓28.0 years↑
"This artifact enters tapped."
Obsidian Obelisk83%
$0.60↑#10595↑0.00↓4.1 years↓
": Add one mana of any color. Spend this mana only to cast a multicolored spell."
: Add one mana of any color. Spend this mana only to cast a multicolored spell."+1 more matching line
Prismatic Geoscope80%
$1.47↑#16914↑0.07↓9.9 years↓
": Add X mana in any combination of colors, where X is the number of basic land types among lands you control."
: Add X mana in any combination of colors, where X is the number of basic land types among lands you control."+1 more matching line
Somberwald Sage80%
$0.49↑#2577↑0.1914.5 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."
Pillar of Origins80%
$0.43↑#6050↑0.219.1 years↓
": Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type."
: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type."
Coldsteel Heart79%
$1.07↑#2118↑0.00↓20.2 years↑
": Add one mana of the chosen color."
: Add one mana of the chosen color."+1 more matching line
White Lotus Tile79%
$4.74↑#3855↑0.31↑0.9 years↓
"This artifact enters tapped."
Empowered Autogenerator78%
$0.23↑#3999↑0.107.2 years↓
"This artifact enters tapped."
Wand of the Worldsoul78%
$3.97↑#5770↑0.06↓3.5 years↓
"This artifact enters tapped."
Wildfield Borderpost78%
$0.15↑#191460.05↓17.5 years↑
"This artifact enters tapped."
Fieldmist Borderpost78%
$0.22↑#16211↑0.05↓17.5 years↑
"This artifact enters tapped."
Mistvein Borderpost78%
$0.17↑#16501↑0.00↓17.5 years↑
"This artifact enters tapped."
Veinfire Borderpost78%
$0.25↑#17181↑0.2717.5 years↑
"This artifact enters tapped."
Firewild Borderpost78%
$0.33↑#17745↑0.1717.5 years↑
"This artifact enters tapped."
Five Hundred Year Diary78%
$0.36↑#6567↑0.33↑3.0 years↓
"this card enters tapped."
Sky Diamond78%
$0.26↑#824↑0.06↓30.0 years↑
"This artifact enters tapped."
Fire Diamond78%
$0.22↑#730↑0.00↓30.0 years↑
"This artifact enters tapped."
Marble Diamond78%
$0.20↑#1117↑0.00↓30.0 years↑
"This artifact enters tapped."
Cryptolith Fragment // Aurora of Emrakul78%
$0.31↑#4944↑0.2510.2 years↓
"This artifact enters tapped."