Fyndhorn Pollen {2}{G}
Enchantment
Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
All creatures get -1/-0.
{1}{G}: All creatures get -1/-0 until end of turn.
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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.
Deluge of Doom 88%
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Ichor Explosion 87%
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"All creatures get -X/-X until end of turn, where X is the sacrificed creature's power."
Glistening Deluge 86%
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"All creatures get -1/-1 until end of turn. Creatures that are green and/or white get an additional -2/-2 until end of turn."