Chromatic Star 
Artifact
{1}, {T}, Sacrifice this artifact: Add one mana of any color.
When this artifact is put into a graveyard from the battlefield, draw a card.
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Cards that do something similar 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.
Chromatic Sphere 100%
$0.37#5167
"{1}, {T}, Sacrifice this artifact: Add one mana of any color. Draw a card."
Barbed Sextant 99%
#18472
"{1}, {T}, Sacrifice this artifact: Add one mana of any color. Draw a card at the beginning of the next turn's upkeep."
Implements of Sacrifice 88%
$0.61#27683
"{1}, {T}, Sacrifice this artifact: Add two mana of any one color."
Astrolabe 87%
#25902
"{1}, {T}, Sacrifice this artifact: Add two mana of any one color. Draw a card at the beginning of the next turn's upkeep."
Glittering Stockpile 82%
$0.40#2228
"{T}, Sacrifice this artifact: Add X mana of any one color, where X is the number of stash counters on this artifact."
Lotus Blossom 80%
$0.40#11571
"{T}, Sacrifice this artifact: Add X mana of any one color, where X is the number of petal counters on this artifact."
Nutrient Block 100%
$0.18#6676
"When this artifact is put into a graveyard from the battlefield, draw a card."
+1 more matching line
Implement of Combustion 100%
$0.24#10961
"When this artifact is put into a graveyard from the battlefield, draw a card."
Implement of Ferocity 100%
$0.23#17878
"When this artifact is put into a graveyard from the battlefield, draw a card."
Implement of Improvement 100%
$0.12#10448
"When this artifact is put into a graveyard from the battlefield, draw a card."
Implement of Malice 100%
$0.14#22224
"When this artifact is put into a graveyard from the battlefield, draw a card."