Brood Sliver 
Creature — Sliver
$4.92 #5293 0.62 23.7 years
Whenever a Sliver deals combat damage to a player, its controller may create a 1/1 colorless Sliver creature token.
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Cards similar to Brood Sliver 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.
Synapse Sliver83%
$6.08↑#58870.5823.7 years
"Whenever a Sliver deals combat damage to a player, its controller may draw a card."
Tempered Sliver80%
$0.32↓#11641↓0.35↓7.4 years↓
"Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.""
Leeching Sliver76%
$0.56↓#11172↓0.75↑12.3 years↓
"Whenever a Sliver you control attacks, defending player loses 1 life."
Essence Sliver75%
$8.16↑#8531↓0.13↓23.7 years
"Whenever a Sliver deals damage, its controller gains that much life."
Cadira, Caller of the Small72%
$0.20↓#3972↑0.16↓4.4 years↓
"Whenever this card deals combat damage to a player, for each token you control, create a 1/1 white Rabbit creature token."
Capricious Sliver72%
$0.67↓#13701↓0.07↓3.2 years↓
"Sliver creatures you control have "Whenever this creature deals combat damage to a player, exile the top card of your library. You may play that card this turn.""
Precinct Captain70%
$0.25↓#11463↓0.22↓14.0 years↓
"Whenever this creature deals combat damage to a player, create a 1/1 white Soldier creature token."
Fungus Sliver70%
$0.57↓#13416↓0.29↓20.0 years↓
"All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it.""