Chaotic Backlash 
Instant
$0.15 #28968 0.23 18.2 years
Chaotic Backlash deals damage to target player equal to twice the number of white and/or blue permanents they control.
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Cards similar to Chaotic Backlash 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.
Jovial Evil92%
$29.88↑#317990.1932.4 years↑
"this card deals X damage to target opponent, where X is twice the number of white creatures that player controls."
Rending Volley86%
$0.21↑#13790↑0.13↓11.6 years↓
"this card deals 4 damage to target white or blue creature."
Fry83%
$0.17↑#232490.13↓7.3 years↓
"this card deals 5 damage to target creature or planeswalker that's white or blue."
Combust82%
$0.09↓#241890.12↓16.3 years↓
"this card deals 5 damage to target white or blue creature. The damage can't be prevented."
Evaporate82%
$0.21↑#313550.06↓31.1 years↑
"this card deals 1 damage to each white and/or blue creature."
Lightning Dart81%
$0.15#284290.00↓26.0 years↑
"this card deals 1 damage to target creature. If that creature is white or blue, this card deals 4 damage to it instead."
Inquisition80%
$0.20↑#315360.06↓32.2 years↑
"Target player reveals their hand. this card deals damage to that player equal to the number of white cards in their hand."
Ignite Disorder78%
$0.02↓#314650.00↓17.7 years
"this card deals 3 damage divided as you choose among one, two, or three target white and/or blue creatures."
Ember Gale75%
$0.20↑#281890.1818.5 years
"Creatures target player controls can't block this turn. this card deals 1 damage to each white and/or blue creature that player controls."
Lithomantic Barrage75%
$0.27↑#17896↑0.313.5 years↓
"this card deals 1 damage to target creature or planeswalker. It deals 5 damage instead if that target is white and/or blue."
White Scarab74%
$0.24↑#251100.05↓31.4 years↑
"Enchanted creature gets +2/+2 as long as an opponent controls a white permanent."
Blue Scarab74%
$0.24↑#252420.2531.4 years↑
"Enchanted creature gets +2/+2 as long as an opponent controls a blue permanent."
Precise Redaction72%
$0.14↓#262260.140.0 years↓
"Counter target white or black spell."
Gainsay72%
$0.07↓#242430.07↓25.7 years↑
"Counter target blue spell."
Mindsparker72%
$0.07↓#20302↑0.06↓13.3 years↓
"Whenever an opponent casts a white or blue instant or sorcery spell, this creature deals 2 damage to that player."
Disorder72%
$0.24↑#315490.1928.0 years↑
"this card deals 2 damage to each white creature and each player who controls a white creature."
Flourishing Grapple70%
$0.15#274220.290.0 years↓
"Target creature or planeswalker an opponent controls that's red or white loses all abilities until end of turn. Target creature you control deals damage equal to its power to that permanent."