Spirit of the Labyrinth 

Enchantment Creature — Spirit
$0.33 #5888 1.37 12.7 years
Each player can't draw more than one card each turn.
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Cards similar to Spirit of the Labyrinth 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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"This spell costs 

less to cast if an opponent has drawn four or more cards this turn."
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