Quick Sliver 

Creature — Sliver
$0.68 #4763 0.50 23.7 years
Flash
Any player may cast Sliver spells as though they had flash.
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Cards similar to Quick Sliver 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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"
,
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+1 more matching line
Aluren71%
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"Any player may cast creature spells with mana value 3 or less without paying their mana costs and as though they had flash."