Raven of Fell Omens 
Creature — Bird
$0.20 #11457 0.06 2.4 years
Flying
Whenever you commit a crime, each opponent loses 1 life and you gain 1 life. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)
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Cards similar to Raven of Fell Omens 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.
Drana's Emissary92%
$0.35↑#6604↑0.22↑10.9 years↑
"At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life."
Dogged Pursuit92%
$0.26↑#126900.25↑5.6 years↑
"At the beginning of your end step, each opponent loses 1 life and you gain 1 life."
Subversion88%
$2.15↑#16719↓0.0027.6 years↑
"At the beginning of your upkeep, each opponent loses 1 life. You gain life equal to the life lost this way."
Agent of Masks88%
$0.12↓#17800↓0.0720.6 years↑
"At the beginning of your upkeep, each opponent loses 1 life. You gain life equal to the life lost this way."
Vampire Neonate88%
$0.13↓#15398↓0.008.1 years↑
"
, 
: Each opponent loses 1 life and you gain 1 life."
, : Each opponent loses 1 life and you gain 1 life."
Sanguine Syphoner88%
$0.19↓#6561↑0.111.8 years
"Whenever this creature attacks, each opponent loses 1 life and you gain 1 life."
Sneering Shadewriter88%
$0.13↓#21076↓0.000.4 years↓
"When this creature enters, each opponent loses 2 life and you gain 2 life."
Skirmish Rhino87%
$0.23↑#17043↓0.16↑1.4 years
"When this creature enters, each opponent loses 2 life and you gain 2 life."
Blight Keeper87%
$0.22↑#16780↓0.56↑8.9 years↑
"Flying"
Blood Hustler86%
$0.15↓#129890.002.4 years
"
: Target opponent loses 1 life and you gain 1 life."
: Target opponent loses 1 life and you gain 1 life."
Insatiable Hemophage86%
$0.23↑#9030↑0.37↑6.4 years↑
"Whenever this creature mutates, each opponent loses X life and you gain X life, where X is the number of times this creature has mutated."
Sinister Monolith84%
$0.31↑#6244↑0.33↑2.1 years
"At the beginning of combat on your turn, each opponent loses 1 life and you gain 1 life."
Vampire Opportunist84%
$0.17↓#25216↓0.067.3 years↑
"
: Each opponent loses 2 life and you gain 2 life."
: Each opponent loses 2 life and you gain 2 life."
Melancholic Poet84%
$0.15↓#15479↓0.000.4 years↓
"Whenever you cast an instant or sorcery spell that targets a creature, each opponent loses 1 life and you gain 1 life."
Garrulous Sycophant82%
$0.27↑#16759↓0.1410.0 years↑
"At the beginning of your end step, if you're the monarch, each opponent loses 1 life and you gain 1 life."
Night Market Lookout82%
$0.21↑#130210.25↑9.9 years↑
"Whenever this creature becomes tapped, each opponent loses 1 life and you gain 1 life."
Intimidation Campaign82%
$0.08↓#15703↓0.002.4 years
"When this enchantment enters, each opponent loses 1 life, you gain 1 life, and you draw a card."
Tormented Hero82%
$0.11↓#22883↓0.25↑12.9 years↑
"Whenever you cast a spell that targets this creature, each opponent loses 1 life. You gain life equal to the life lost this way."
Chancellor of the Dross82%
$1.18↑#17140↓0.53↑15.3 years↑
"You may reveal this card from your opening hand. If you do, at the beginning of the first upkeep, each opponent loses 3 life, then you gain life equal to the life lost this way."
Scheming Aspirant82%
$0.30↑#6881↑0.123.6 years↑
"Whenever you proliferate, each opponent loses 2 life and you gain 2 life."