Magistrate's Scepter {3}
Artifact
{4}, {T}: Put a charge counter on this artifact.
{T}, Remove three charge counters from this artifact: Take an extra turn after this one.
click a line to search just that ability, click more to combine them
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.
Conversion Chamber 96%
$0.10#23220
"{2}, {T}, Remove a charge counter from this artifact: Create a 3/3 colorless Phyrexian Golem artifact creature token."
Jeweled Amulet 95%
#3622
"{1}, {T}: Put a charge counter on this artifact. Note the type of mana spent to pay this activation cost. Activate only if there are no charge counters on this artifact."
+1 more matching line
Trigon of Infestation 89%
$0.21#22876
"{2}, {T}, Remove a charge counter from this artifact: Create a 1/1 green Phyrexian Insect creature token with infect."
+1 more matching line
Surge Node 88%
$0.36#17588
"{1}, {T}, Remove a charge counter from this artifact: Put a charge counter on target artifact."
+1 more matching line
Rimefire Torque 88%
$0.23#11890
"{T}, Remove three charge counters from this artifact: When you next cast an instant or sorcery spell this turn, copy it. You may choose new targets for the copy."
+1 more matching line
Trigon of Thought 85%
$0.09#29056
"{2}, {T}, Remove a charge counter from this artifact: Draw a card."
+1 more matching line
Serum Tank 85%
$0.44#22735
"{3}, {T}, Remove a charge counter from this artifact: Draw a card."
+1 more matching line