Root Sliver 
Creature — Sliver
$6.03 #6463 0.88 23.7 years
This spell can't be countered.
Sliver spells can't be countered.
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Cards similar to Root 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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"Spells you control can't be countered."
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