Vincent, Vengeful Atoner {2}{R}
Legendary Creature — Assassin
Menace
Whenever one or more creatures you control deal combat damage to a player, put a +1/+1 counter on Vincent.
Chaos — Whenever Vincent deals combat damage to an opponent, it deals that much damage to each other opponent if Vincent's power is 7 or greater.
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.
Amarant Coral 92%
$3.77#15826
"Whenever this card deals combat damage to an opponent, it deals that much damage to each other opponent."
Shaman of the Great Hunt 84%
$0.98#11770
"Whenever a creature you control deals combat damage to a player, put a +1/+1 counter on it."
Borborygmos 84%
$0.37#16844
"Whenever this card deals combat damage to a player, put a +1/+1 counter on each creature you control."
Marcus, Mutant Mayor 83%
$0.85#6357
"Whenever a creature you control deals combat damage to a player, draw a card if that creature has a +1/+1 counter on it. If it doesn't, put a +1/+1 counter on it."
Basim Ibn Ishaq 83%
$1.92#2986
"Whenever this card deals combat damage to a player, put a +1/+1 counter on it."
Skullbriar, the Walking Grave 83%
$2.46#8580
"Whenever this card deals combat damage to a player, put a +1/+1 counter on it."
Haliya, Ascendant Cadet 82%
$0.21#9621
"Whenever one or more creatures you control with +1/+1 counters on them deal combat damage to a player, draw a card."
Kediss, Emberclaw Familiar 82%
$5.09#1143
"Whenever a commander you control deals combat damage to an opponent, it deals that much damage to each other opponent."
Quilled Greatwurm 81%
$2.77#2317
"Whenever a creature you control deals combat damage during your turn, put that many +1/+1 counters on it."
Necropolis Regent 81%
$0.55#3951
"Whenever a creature you control deals combat damage to a player, put that many +1/+1 counters on it."
Drana, Liberator of Malakir 81%
$0.64#1484
"Whenever this card deals combat damage to a player, put a +1/+1 counter on each attacking creature you control."
Jocasta, Automaton Avenger 81%
$1.04#17269
"Whenever your commander deals combat damage to a player, put a +1/+1 counter on this card."
Zuko, Seeking Honor 81%
$0.12#15461
"Whenever this card deals combat damage to a player, put a +1/+1 counter on him."
Sphere Grid 81%
$8.87#1407
"Whenever a creature you control deals combat damage to a player, put a +1/+1 counter on that creature."
Cazur, Ruthless Stalker 81%
$0.38#7935
"Whenever a creature you control deals combat damage to a player, put a +1/+1 counter on that creature."
Kazarov, Sengir Pureblood 80%
$0.25#21402
"Whenever a creature an opponent controls is dealt damage, put a +1/+1 counter on this card."
Bred for the Hunt 80%
$0.50#2662
"Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, you may draw a card."