Borborygmos 
Legendary Creature — Cyclops
$0.37 #17178 0.31 20.6 years
Trample
Whenever Borborygmos deals combat damage to a player, put a +1/+1 counter on each creature you control.
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Cards similar to Borborygmos 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.
Thunderwolf Cavalry95%
$0.35↓#152570.383.9 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on each other creature you control."
Drana, Liberator of Malakir93%
$0.88↑#1521↑0.19↓10.9 years↓
"Whenever this card deals combat damage to a player, put a +1/+1 counter on each attacking creature you control."
Markov Blademaster90%
$0.30↓#13465↑0.10↓14.6 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Erdwal Ripper90%
$0.21↓#25520↓0.06↓14.6 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Stromkirk Patrol90%
$0.08↓#27363↓0.2714.9 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Predator90%
$0.11↓#28916↓0.00↓22.9 years↑
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Firewalker90%
$0.10↓#28099↓0.2422.9 years↑
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Falkenrath Marauders90%
$0.26↓#160870.20↓14.9 years↓
"Whenever this creature deals combat damage to a player, put two +1/+1 counters on it."
Heirs of Stromkirk90%
$0.13↓#23805↓0.2514.3 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Slith Ascendant90%
$0.09↓#25038↓0.2922.9 years↑
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Havengul Vampire88%
$0.14↓#21336↓0.2514.3 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Wakka, Devoted Guardian87%
$0.21↓#5147↑0.401.2 years↓
"At the beginning of your end step, if a counter was put on this card this turn, put a +1/+1 counter on each other creature you control."
Slith Bloodletter85%
$0.12↓#29555↓0.2522.9 years↑
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Bloodcrazed Neonate84%
$0.09↓#22630↓0.17↓14.9 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Guild Thief84%
$0.05↓#22872↓0.255.1 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Briar Hydra82%
$0.30↓#12871↑0.384.0 years↓
"Whenever this creature deals combat damage to a player, put X +1/+1 counters on target creature you control, where X is the number of basic land types among lands you control."
+1 more matching line
Falkenrath Exterminator82%
$0.17↓#180290.2714.3 years↓
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Necropolis Regent81%
$0.40↑#4062↑0.21↓13.9 years↓
"Whenever a creature you control deals combat damage to a player, put that many +1/+1 counters on it."
Slith Strider81%
$0.09↓#27979↓0.50↑22.9 years↑
"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Zuri, Warrior of Wakanda81%
$0.23↓#178970.00↓0.2 years↓
"Trample"