Fynn, the Fangbearer 

Legendary Creature — Human Warrior
$0.18 #2706 1.15 5.6 years
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Whenever a creature you control with deathtouch deals combat damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)
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Cards similar to Fynn, the Fangbearer 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.
Virulent Silencer87%
$0.30↑#7457↓0.58↓1.1 years↓
"Whenever a nontoken artifact creature you control deals combat damage to a player, that player gets two poison counters."
White Widow, Yelena Belova78%
$0.82↑#18291↓0.00↓0.2 years↓
"Whenever a creature you control with deathtouch deals combat damage to a player, put a +1/+1 counter on it."
+1 more matching line
Pit Scorpion76%
$0.09↓#28515↓0.86↓32.3 years↑
"Whenever this creature deals damage to a player, that player gets a poison counter."
Aveline de Grandpré73%
$0.37↑#7394↓0.41↓2.2 years↓
"Whenever a creature you control with deathtouch deals combat damage to a player, put that many +1/+1 counters on that creature."
+1 more matching line
Necrogen Rotpriest73%
$0.18#6912↓0.71↓3.6 years↓
"Whenever a creature you control with toxic deals combat damage to a player, that player gets an additional poison counter."
Marsh Viper73%
$0.09↓#22925↓0.42↓32.1 years↑
"Whenever this creature deals damage to a player, that player gets two poison counters."
Etali, Primal Conqueror // Etali, Primal Sickness72%
$25.50↑#799↑1.65↑3.4 years↓
"Whenever this card deals combat damage to a player, they get that many poison counters."