Boltwave 
Sorcery
$2.99 #1451 0.16 1.8 years
Boltwave deals 3 damage to each opponent.
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Cards similar to Boltwave 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.
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"When this creature enters, it deals 1 damage to each opponent."
Legion Guildmage72%
$0.15↓#24153↓0.257.9 years↑
"
,
: This creature deals 3 damage to each opponent."
Glassworks // Shattered Yard72%
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"At the beginning of your end step, this Room deals 1 damage to each opponent."
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"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."
Lightning Reaver71%
$0.58↓#20342↓0.71↑17.3 years↑
"At the beginning of your end step, this creature deals damage equal to the number of charge counters on it to each opponent."