Cards similar to Metal Fatigue 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.
Roaring Slagwurm86%
$0.32↑#22787↑0.22↓22.7 years
"Whenever this creature attacks, tap all artifacts."
Rust Tick82%
$0.21↑#266040.13↓16.1 years↓
"
,
: Tap target artifact. It doesn't untap during its controller's untap step for as long as this creature remains tapped."
Kill Switch82%
$4.04↑#16897↑1.13↑26.7 years↑
"
,
: Tap all other artifacts. They don't untap during their controllers' untap steps for as long as this artifact remains tapped."
Phyrexian Gremlins76%
$1.06↑#307170.14↓32.6 years↑
"
: Tap target artifact. It doesn't untap during its controller's untap step for as long as this creature remains tapped."
Glare of Subdual75%
$0.51↑#11785↑1.47↑21.0 years↓
"Tap an untapped creature you control: Tap target artifact or creature."
Tangle Wire74%
$20.10↑#8525↑1.19↑26.7 years↑
"At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on this artifact."