Lunar Convocation {W}{B}
Enchantment
At the beginning of your end step, if you gained life this turn, each opponent loses 1 life.
At the beginning of your end step, if you gained and lost life this turn, create a 1/1 black Bat creature token with flying.
{1}{B}, Pay 2 life: Draw a card.
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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.
Arguel's Blood Fast // Temple of Aclazotz 100%
$0.36#8311
"{1}{B}, Pay 2 life: Draw a card."
+1 more matching line
Defiling Daemogoth 90%
$0.89#8062
"At the beginning of your end step, each opponent loses X life, where X is the amount of life you gained this turn."
Indulging Patrician 87%
$0.31#4218
"At the beginning of your end step, if you gained 3 or more life this turn, each opponent loses 3 life."
Vrock 84%
$0.20#16718
"At the beginning of your end step, if a permanent you controlled left the battlefield this turn, each opponent loses 3 life."
Warlock Class 84%
$0.15#6960
"At the beginning of your end step, if a creature died this turn, each opponent loses 1 life."
+1 more matching line