Planeswalker's Fury {2}{R}
Enchantment
{3}{R}: Target opponent reveals a card at random from their hand. This enchantment deals damage equal to that card's mana value to that player. Activate only as a sorcery.
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Cards that do something similar 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.