Drana's Emissary 


Creature — Vampire Cleric Ally
Flying
At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.
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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.
Tithing Blade // Consuming Sepulcher 100%
$0.48#4583
"At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life."
Sinister Monolith 84%
$0.21#6029
"At the beginning of combat on your turn, each opponent loses 1 life and you gain 1 life."