Staff of Compleation {3}
Artifact
{T}, Pay 1 life: Destroy target permanent you own.
{T}, Pay 2 life: Add one mana of any color.
{T}, Pay 3 life: Proliferate.
{T}, Pay 4 life: Draw a card.
{5}: Untap this artifact.
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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.
Spire of Industry 99%
$0.31#393
"{T}, Pay 1 life: Add one mana of any color. Activate only if you control an artifact."
Corrupted Crossroads 98%
$0.14#5896
"{T}, Pay 1 life: Add one mana of any color. Spend this mana only to cast a spell with devoid."
Fixer, Techno Terror 98%
$0.39#28568
"{T}, Pay 2 life: Draw a card. Activate only if an artifact entered under your control this turn."
Voldaren Estate 98%
$0.27#2428
"{T}, Pay 1 life: Add one mana of any color. Spend this mana only to cast a Vampire spell."
Great Hall of the Biblioplex 98%
$0.67#10779
"{T}, Pay 1 life: Add one mana of any color. Spend this mana only to cast an instant or sorcery spell."
Bonecache Overseer 95%
$0.28#8561
"{T}, Pay 1 life: Draw a card. Activate only if three or more cards left your graveyard this turn or if you've sacrificed a Food this turn."
Serpent's Soul-Jar 92%
$0.33#15675
"{T}, Pay 2 life: Until end of turn, you may cast a creature spell from among cards exiled with this artifact."
Vona, Butcher of Magan 89%
$0.27#5630
"{T}, Pay 7 life: Destroy target nonland permanent. Activate only during your turn."
Thieving Varmint 88%
$3.47#4466
"{T}, Pay 1 life: Add two mana of any one color. Spend this mana only to cast spells you don't own."