Havoc 
Enchantment
$0.24 #29589 0.33 29.0 years
Whenever an opponent casts a white spell, they lose 2 life.
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Cards similar to Havoc 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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"Whenever an opponent casts a white spell, that player loses 1 life and you gain 1 life."
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Self-Inflicted Wound70%
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"Target opponent sacrifices a green or white creature of their choice. If that player does, they lose 2 life."