Suncleanser 

Creature — Human Cleric
$0.37 #20548 0.30 8.3 years
When this creature enters, choose one —
• Remove all counters from target creature. It can't have counters put on it for as long as this creature remains on the battlefield.
• Target opponent loses all counters. That player can't get counters for as long as this creature remains on the battlefield.
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Cards similar to Suncleanser 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.
Heartless Act80%
$0.16↓#4812↑0.14↓6.5 years↓
"• Remove up to three counters from target creature."
+2 more matching lines
Final Act78%
$0.39↑#3721↑0.70↑2.3 years↓
"• Each opponent loses all counters."
+1 more matching line
Blightbeetle77%
$0.46↑#7294↑0.48↑7.3 years
"Creatures your opponents control can't have +1/+1 counters put on them."
Leeches76%
$3.05↑#27463↓0.06↓31.1 years↑
"Target player loses all poison counters. this card deals that much damage to that player."
Survivor's Med Kit76%
$0.30↓#13473↑0.312.6 years↓
"• RadAway — Target player loses all rad counters. Sacrifice this artifact."
Invasion of Fiora // Marchesa, Resolute Monarch74%
$0.50↑#6732↑0.393.5 years↓
"When this Siege enters, choose one or both —"
Blitz Leech70%
$0.09↓#25750↓0.00↓6.5 years↓
"When this creature enters, target creature an opponent controls gets -2/-2 until end of turn. Remove all counters from that creature."