Hemmer, Fixing What Is Broken 
Legendary Creature — Aenar Artificer
$0.17 #26081 0.0 years
During your turn, Spacecraft you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)
Whenever Hemmer becomes tapped, draw a card, then discard a card.
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Cards similar to Hemmer, Fixing What Is Broken 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 this creature becomes tapped, you may discard a card. If you do, draw a card."
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"Other permanents you control have hexproof."
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"Other permanents you control have hexproof."
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"During your turn, this Spacecraft and creatures you control have hexproof."
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