Plague of Vermin {6}{B}
Sorcery
Starting with you, each player may pay any amount of life. Repeat this process until no one pays life. Each player creates a 1/1 black Rat creature token for each 1 life they paid this way.
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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.
Karn's Sylex 86%
$0.94#13097
"Players can't pay life to cast spells or to activate abilities that aren't mana abilities."
Alliance of Arms 83%
$13.32#11548
"Starting with you, each player may pay any amount of mana. Each player creates X 1/1 white Soldier creature tokens, where X is the total amount of mana paid this way."
Minds Aglow 81%
$1.30#3785
"Starting with you, each player may pay any amount of mana. Each player draws X cards, where X is the total amount of mana paid this way."