Metalwork Colossus {11}
Artifact Creature — Construct
This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control.
Sacrifice two artifacts: Return this card from your graveyard to your hand.
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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.
Stoic Rebuttal 81%
$0.30#6572
"This spell costs {1} less to cast if you control three or more artifacts."
Assassin's Ink 81%
$0.25#15287
"This spell costs {1} less to cast if you control an artifact and {1} less to cast if you control an enchantment."
Cavern-Hoard Dragon 81%
$14.28#1475
"This spell costs {X} less to cast, where X is the greatest number of artifacts an opponent controls."