Ashnod's Altar 
Artifact
$14.33 #134 1.13 32.6 years
Sacrifice a creature: Add 
.
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Cards similar to Ashnod's Altar 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.
Phyrexian Altar92%
$54.22↑#307↓1.32↑26.0 years↓
"Sacrifice a creature: Add one mana of any color."
Krark-Clan Ironworks88%
$12.29↓#1319↓1.1622.4 years↓
"Sacrifice an artifact: Add ."
."
Phyrexian Tower88%
$30.75↑#194↓0.66↓28.0 years↓
"
, Sacrifice a creature: Add 
."
, Sacrifice a creature: Add ."
Thermopod86%
$0.26↓#10279↓0.44↓20.2 years↓
"Sacrifice a creature: Add 
."
."
Transmogrant Altar85%
$0.15↓#10901↓0.00↓3.9 years↓
", , Sacrifice a creature: Add ."
, , Sacrifice a creature: Add ."
Sisay's Ring82%
$0.33↓#4879↓0.58↓29.7 years↓
": Add ."
: Add ."
Ur-Golem's Eye82%
$0.32↓#7601↓0.00↓22.7 years↓
": Add ."
: Add ."
Thran Dynamo82%
$2.04↓#195↓0.06↓27.4 years↓
": Add ."
: Add ."
Worn Powerstone80%
$0.26↓#573↓0.00↓28.0 years↓
": Add ."
: Add ."
The Eternity Elevator76%
$2.07↓#1558↓0.12↓1.2 years↓
": Add ."
: Add ."
Sol Ring76%
$1.25↓#1↑1.59↑33.2 years
": Add ."
: Add ."
Illuminor Szeras76%
$6.13↓#5359↓0.68↓4.0 years↓
", Sacrifice another creature: Add an amount of equal to the sacrificed creature's mana value."
, Sacrifice another creature: Add an amount of equal to the sacrificed creature's mana value."
Squandered Resources75%
$84.42↑#5403↓0.60↓29.7 years↓
"Sacrifice a land: Add one mana of any type the sacrificed land could produce."
The Golden Throne73%
$9.57↓#4498↓0.27↓4.0 years↓
", Sacrifice a creature: Add three mana in any combination of colors."
, Sacrifice a creature: Add three mana in any combination of colors."
Hedron Archive73%
$0.22↓#544↓0.00↓11.0 years↓
": Add ."
: Add ."
Prismatic Lens72%
$0.27↓#1660↓0.00↓20.0 years↓
": Add ."
: Add ."
Blood Vassal71%
$0.25↓#16985↓0.06↓28.0 years↓
"Sacrifice this creature: Add ."
."
Sacrifice70%
$4.60↓#2858↓0.32↓33.2 years
"Add an amount of equal to the sacrificed creature's mana value."
equal to the sacrificed creature's mana value."
Catalyst Elemental70%
$0.11↓#17944↓0.06↓8.3 years↓
"Sacrifice this creature: Add ."
."
Composite Golem70%
$0.30↓#18883↓0.00↓22.4 years↓
"Sacrifice this creature: Add 
."
."