Workhorse 
Artifact Creature — Horse
This creature enters with four +1/+1 counters on it.
Remove a +1/+1 counter from this creature: Add {C}.
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.
Balduvian Hydra 86%
#28989
"Remove a +1/+0 counter from this creature: Prevent the next 1 damage that would be dealt to it this turn."
+1 more matching line
Spike Soldier 86%
$0.17#27811
"Remove a +1/+1 counter from this creature: This creature gets +2/+2 until end of turn."
+1 more matching line
Arcbound Reclaimer 85%
$6.76#7395
"Remove a +1/+1 counter from this creature: Put target artifact card from your graveyard on top of your library."
Spincrusher 85%
$0.20#23189
"Remove a +1/+1 counter from this creature: This creature can't be blocked this turn."
Lunar Avenger 84%
$0.09#25842
"Remove a +1/+1 counter from this creature: This creature gains your choice of flying, first strike, or haste until end of turn."
Oathsworn Knight 100%
$0.31#18953
"This creature enters with four +1/+1 counters on it."
+1 more matching line
Spike Colony 100%
#27806
"This creature enters with four +1/+1 counters on it."
+1 more matching line
Phantom Wurm 100%
$0.24#22906
"This creature enters with four +1/+1 counters on it."
+1 more matching line
Clockwork Dragon 91%
$0.45#20764
"This creature enters with six +1/+1 counters on it."
+1 more matching line