Simic Cluestone 
Artifact
{T}: Add {G} or {U}.
{G}{U}, {T}, Sacrifice this artifact: 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.
Temur Banner 82%
$0.19#16402
"{G}{U}{R}, {T}, Sacrifice this artifact: Draw a card."
+1 more matching line