Trespasser's Curse {1}{B}
Enchantment — Aura Curse
Enchant player
Whenever a creature enchanted player controls enters, that player loses 1 life and you gain 1 life.
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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.