Fynn, the Fangbearer {1}{G}
Legendary Creature — Human Warrior
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 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.
Marsh Viper 88%
$0.09#22564
"Whenever this creature deals damage to a player, that player gets two poison counters."
Virulent Silencer 85%
$0.28#7677
"Whenever a nontoken artifact creature you control deals combat damage to a player, that player gets two poison counters."
Bonepicker Skirge 82%
$0.17#16970
"As long as an opponent has three or more poison counters, this creature has deathtouch and lifelink."
Necrogen Rotpriest 82%
$0.12#6864
"Whenever a creature you control with toxic deals combat damage to a player, that player gets an additional poison counter."