Brimstone Vandal 

Creature — Devil
$0.09 #24323 0.05 5.1 years
Menace (This creature can't be blocked except by two or more creatures.)
If it's neither day nor night, it becomes day as this creature enters.
Whenever day becomes night or night becomes day, this creature deals 1 damage to each opponent.
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Cards similar to Brimstone Vandal 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.
Sunrise Cavalier96%
$0.08↓#269300.065.1 years
"If it's neither day nor night, it becomes day as this creature enters."
+1 more matching line
Firmament Sage96%
$0.09#262750.055.1 years
"If it's neither day nor night, it becomes day as this creature enters."
+1 more matching line
Sunstreak Phoenix88%
$0.25↑#212370.25↑5.1 years
"If it's neither day nor night, it becomes day as this creature enters."
+1 more matching line
Vadrik, Astral Archmage86%
$0.26↑#11818↑0.21↑5.1 years
"If it's neither day nor night, it becomes day as this card enters."
+1 more matching line
Gavony Dawnguard85%
$0.08↓#260090.055.1 years
"If it's neither day nor night, it becomes day as this creature enters."
Component Collector84%
$0.12↑#258360.29↑5.1 years
"If it's neither day nor night, it becomes day as this creature enters."
Celestus Sanctifier84%
$0.05↓#30501↓0.31↑5.1 years
"If it's neither day nor night, it becomes day as this creature enters."
The Celestus84%
$0.76↑#6312↑0.41↑5.1 years
"If it's neither day nor night, it becomes day as this card enters."
Obsessive Astronomer82%
$0.14↑#255360.29↑5.1 years
"If it's neither day nor night, it becomes day as this creature enters."
+1 more matching line
Lambholt Raconteur // Lambholt Ravager77%
$0.26↑#17229↑0.124.9 years
"Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent."
+1 more matching line
Panicked Altisaur76%
$0.16↑#14077↑0.33↑2.9 years↓
"
: This creature deals 2 damage to each opponent."
Impatience76%
$0.29↑#231590.25↑27.4 years↑
"At the beginning of each player's end step, if that player didn't cast a spell this turn, this enchantment deals 2 damage to that player."
Antagonism76%
$0.41↑#258600.18↑28.0 years↑
"At the beginning of each player's end step, this enchantment deals 2 damage to that player unless one of their opponents was dealt damage this turn."
Lasting Tarfire74%
$0.24↑#6199↑0.140.7 years↓
"At the beginning of each end step, if you put a counter on a creature this turn, this enchantment deals 2 damage to each opponent."
Glassworks // Shattered Yard73%
$0.15↑#9462↑0.112.1 years↓
"At the beginning of your end step, this Room deals 1 damage to each opponent."
Zhur-Taa Druid72%
$0.19↑#4257↑0.1513.5 years↑
"Whenever you tap this creature for mana, it deals 1 damage to each opponent."