Melira, Sylvok Outcast 
Legendary Creature — Human Scout
$4.94 #11233 0.00 15.3 years
You can't get poison counters.
Creatures you control can't have -1/-1 counters put on them.
Creatures your opponents control lose infect.
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Cards similar to Melira, Sylvok Outcast 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.
Solemnity78%
$9.98↑#3945↑1.22↑9.1 years↓
"Players can't get counters."
Vizier of Remedies74%
$0.22↓#117060.21↑9.4 years↓
"If one or more -1/-1 counters would be put on a creature you control, that many -1/-1 counters minus one are put on it instead."
Melira's Keepers70%
$0.03↓#31741↓0.29↑15.6 years
"This creature can't have counters put on it."
Tatterkite70%
$0.34↓#19016↓0.25↑18.3 years↑
"This creature can't have counters put on it."
Blightbeetle70%
$0.32↓#7216↑0.31↑7.2 years↓
"Creatures your opponents control can't have +1/+1 counters put on them."
Melira, the Living Cure70%
$0.20↓#17218↓0.29↑3.6 years↓
"If you would get one or more poison counters, instead you get one poison counter and you can't get additional poison counters this turn."