Erdwal Ripper {1}{R}{R}
Creature — Vampire
Haste
Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.
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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.
Slith Firewalker 100%
$0.14#27699
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
+1 more matching line
Bloodcrazed Neonate 100%
$0.13#22367
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Ascendant 100%
$0.05#24600
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Heirs of Stromkirk 100%
$0.11#23476
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Strider 100%
$0.10#27715
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Havengul Vampire 100%
$0.26#20873
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Stromkirk Patrol 100%
$0.12#27043
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Arcbound Slith 100%
$0.55#8872
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Hexgold Slith 100%
$0.18#22586
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Predator 100%
$0.12#28589
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Falkenrath Exterminator 100%
$0.24#17576
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Bloodletter 100%
$0.12#29236
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Bloodmad Vampire 100%
$0.20#12098
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Stromkirk Noble 100%
$0.12#13270
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Guild Thief 100%
$0.21#22501
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Markov Blademaster 100%
$0.31#13295
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Etched Slith 99%
$0.17#17179
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it. When you do, you may remove a counter from another target permanent or opponent."
Conclave Sledge-Captain 90%
$1.76#7205
"Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it."
Westgate Regent 90%
$0.31#13389
"Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it."