Baleful Mastery 
Instant
$1.79 #1432 0.19 5.5 years
You may pay 
rather than pay this spell's mana cost.
rather than pay this spell's mana cost.If the cost was paid, an opponent draws a card.
cost was paid, an opponent draws a card.Exile target creature or planeswalker.
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Cards similar to Baleful Mastery 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.
Feed the Serpent88%
$0.24↓#16039↓0.05↓5.7 years
"Exile target creature or planeswalker."
Necrotic Fumes84%
$0.14↓#24947↓0.255.5 years
"Exile target creature or planeswalker."
Angelic Ascension84%
$0.30↓#11597↓0.156.3 years
"Exile target creature or planeswalker. Its controller creates a 4/4 white Angel creature token with flying."
Worthy Cost82%
$0.22↓#5605↓0.121.5 years↓
"Exile target creature or planeswalker."
Vraska's Contempt82%
$0.37↓#12720↓0.269.1 years↑
"Exile target creature or planeswalker. You gain 2 life."
Final Death80%
$0.14↓#23230↓0.35↑6.7 years↑
"Exile target creature."
Final Reward80%
$0.06↓#23751↓0.00↓9.5 years↑
"Exile target creature."
Unmake80%
$0.16↓#15395↓0.1718.2 years↑
"Exile target creature."
Wander Off80%
$0.13↓#15299↓0.08↓0.5 years↓
"Exile target creature."
Ingenious Mastery80%
$0.17↓#11910↓0.05↓5.5 years
"You may pay 
rather than pay this spell's mana cost."
rather than pay this spell's mana cost."+1 more matching line
Overwhelming Remorse78%
$0.21↓#7638↓0.183.9 years↓
"Exile target creature or planeswalker."
Eaten Alive78%
$0.11↓#3135↓0.115.1 years
"Exile target creature or planeswalker."
Flay Essence76%
$0.18↓#15976↓0.07↓5.3 years
"Exile target creature or planeswalker. You gain life equal to the number of counters on it."
Bargain76%
$1.01↓#23630↓0.00↓28.3 years↑
"Target opponent draws a card."
Bringer of the Green Dawn76%
$1.68↓#21427↓0.00↓22.4 years↑
"You may pay 
rather than pay this spell's mana cost."
rather than pay this spell's mana cost."
Reality Shift76%
$0.25↓#285↑0.2811.8 years↑
"Exile target creature. Its controller manifests the top card of their library."
Merciless Repurposing76%
$0.04↓#21574↓0.293.5 years↓
"Exile target creature. Incubate 3."
Incubation // Incongruity76%
$0.10↓#11695↓0.00↓7.7 years↑
"Exile target creature. That creature's controller creates a 3/3 green Frog Lizard creature token."
Deadly Rollick75%
$26.08↑#106↑1.40↑6.5 years↑
"Exile target creature."
+1 more matching line
Loran of the Third Path75%
$4.89↑#340↑0.283.9 years↓
"
: You and target opponent each draw a card."
: You and target opponent each draw a card."