Synod Centurion {4}
Artifact Creature — Construct
When you control no other artifacts, sacrifice this creature.
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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.
Voltage Surge 83%
$0.13#19442
"As an additional cost to cast this spell, you may sacrifice an artifact."
Splitting the Powerstone 82%
$0.10#21308
"As an additional cost to cast this spell, sacrifice an artifact."
Incendiary Sabotage 82%
$0.05#26907
"As an additional cost to cast this spell, sacrifice an artifact."
Trash for Treasure 82%
$1.44#3784
"As an additional cost to cast this spell, sacrifice an artifact."
Dargo, the Shipwrecker 81%
$0.21#8006
"As an additional cost to cast this spell, you may sacrifice any number of artifacts and/or creatures. This spell costs {2} less to cast for each permanent sacrificed this way and {2} less to cast for each other artifact or creature you've sacrificed this turn."
Phylactery Lich 81%
$0.33#17030
"When you control no permanents with phylactery counters on them, sacrifice this creature."
Dauthi Mindripper 80%
$0.26#22949
"Whenever this creature attacks and isn't blocked, you may sacrifice it. If you do, defending player discards three cards."