Ashnod's Altar 
Artifact
$12.83 #134 1.12 32.5 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%
$55.87↑#310↓1.26↑25.9 years↓
"Sacrifice a creature: Add one mana of any color."
Krark-Clan Ironworks88%
$13.75↑#1331↓1.1422.3 years↓
"Sacrifice an artifact: Add ."
."
Phyrexian Tower88%
$26.18↑#198↓0.41↓27.9 years↓
"
, Sacrifice a creature: Add 
."
, Sacrifice a creature: Add ."
Thermopod86%
$0.28↓#10091↓0.56↓20.1 years↓
"Sacrifice a creature: Add 
."
."
Transmogrant Altar85%
$0.15↓#10677↓0.06↓3.8 years↓
", , Sacrifice a creature: Add ."
, , Sacrifice a creature: Add ."
Ur-Golem's Eye82%
$0.35↓#7639↓0.00↓22.6 years↓
": Add ."
: Add ."
Sisay's Ring82%
$0.31↓#4882↓0.29↓29.6 years↓
": Add ."
: Add ."
Thran Dynamo82%
$2.12↓#201↓0.41↓27.2 years↓
": Add ."
: Add ."
Worn Powerstone80%
$0.32↓#574↓0.73↓27.9 years↓
": Add ."
: Add ."
The Eternity Elevator76%
$2.06↓#1687↓0.19↓1.1 years↓
": Add ."
: Add ."
Sol Ring76%
$1.48↓#1↑1.46↑33.1 years
": Add ."
: Add ."
Illuminor Szeras76%
$7.02↓#5273↓0.23↓3.9 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%
$85.20↑#5430↓0.55↓29.6 years↓
"Sacrifice a land: Add one mana of any type the sacrificed land could produce."
The Golden Throne73%
$10.61↓#4400↓0.65↓3.9 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%
$0.26↓#544↓0.00↓10.9 years↓
": Add ."
: Add ."
Prismatic Lens72%
$0.26↓#1654↓0.40↓19.9 years↓
": Add ."
: Add ."
Blood Vassal71%
$0.22↓#17376↓0.10↓27.9 years↓
"Sacrifice this creature: Add ."
."
Sacrifice70%
$5.77↓#2876↓0.31↓33.1 years
"Add an amount of equal to the sacrificed creature's mana value."
equal to the sacrificed creature's mana value."
Burnt Offering70%
$1.44↓#3125↓0.28↓31.3 years↓
"Add X mana in any combination of and/or , where X is the sacrificed creature's mana value."
and/or , where X is the sacrificed creature's mana value."
Catalyst Elemental70%
$0.12↓#17705↓0.00↓8.1 years↓
"Sacrifice this creature: Add ."
."