Chaotic Backlash 
Instant
$0.15 #28677 0.36 18.1 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%
$28.04↑#314410.60↑32.3 years↑
"this card deals X damage to target opponent, where X is twice the number of white creatures that player controls."
Rending Volley86%
$0.22↑#13183↑0.00↓11.4 years↓
"this card deals 4 damage to target white or blue creature."
Inquisition85%
$0.22↑#312260.00↓32.1 years↑
"Target player reveals their hand. this card deals damage to that player equal to the number of white cards in their hand."
Lightning Dart84%
$0.16↑#284010.00↓25.9 years↑
"this card deals 1 damage to target creature. If that creature is white or blue, this card deals 4 damage to it instead."
Fry82%
$0.18↑#22873↑0.357.2 years↓
"this card deals 5 damage to target creature or planeswalker that's white or blue."
Evaporate81%
$0.20↑#312960.05↓30.9 years↑
"this card deals 1 damage to each white and/or blue creature."
Ember Gale80%
$0.22↑#279400.48↑18.3 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 Barrage80%
$0.21↑#17389↑0.57↑3.4 years↓
"this card deals 1 damage to target creature or planeswalker. It deals 5 damage instead if that target is white and/or blue."
Combust80%
$0.10↓#238360.00↓16.1 years↓
"this card deals 5 damage to target white or blue creature. The damage can't be prevented."
Mindsparker76%
$0.08↓#20111↑0.3613.1 years↓
"Whenever an opponent casts a white or blue instant or sorcery spell, this creature deals 2 damage to that player."
Ignite Disorder76%
$0.03↓#312010.2717.6 years
"this card deals 3 damage divided as you choose among one, two, or three target white and/or blue creatures."
Magistrate's Veto72%
$0.25↑#252580.4526.9 years↑
"White creatures and blue creatures can't block."
Cinder Cloud70%
$0.05↓#281380.57↑29.9 years↑
"Destroy target creature. If a white creature dies this way, this card deals damage to that creature's controller equal to the creature's power."
Parch70%
$0.12↓#305950.05↓27.6 years↑
"• this card deals 4 damage to target blue creature."
Blue Scarab70%
$0.27↑#250000.00↓31.3 years↑
"Enchanted creature gets +2/+2 as long as an opponent controls a blue permanent."
White Scarab70%
$0.24↑#248960.4231.3 years↑
"Enchanted creature gets +2/+2 as long as an opponent controls a white permanent."