Strixhaven Stadium {3}
Artifact
{T}: Add {C}. Put a point counter on this artifact.
Whenever a creature deals combat damage to you, remove a point counter from this artifact.
Whenever a creature you control deals combat damage to an opponent, put a point counter on this artifact. Then if it has ten or more point counters on it, remove them all and that player loses the game.
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.
Tablet of Compleation 99%
$0.23#12941
"{T}: Add {C}. Activate only if this artifact has two or more oil counters on it."
Automated Artificer 99%
$0.39#9019
"{T}: Add {C}. Spend this mana only to activate an ability or cast an artifact spell."
Sage of the Unknowable 99%
$0.07#20230
"{T}: Add {C}. Spend this mana only to cast a colorless spell or to activate an ability."
Curious Homunculus // Voracious Reader 99%
$0.29#9383
"{T}: Add {C}. Spend this mana only to cast an instant or sorcery spell."
+1 more matching line
Vodalian Arcanist 99%
$0.27#17273
"{T}: Add {C}. Spend this mana only to cast an instant or sorcery spell."
Osgood, Operation Double 99%
$0.26#12999
"{T}: Add {C}. Spend this mana only to cast an artifact spell or activate an ability of an artifact."