Tangleroot 
Artifact
$0.65 #17466 0.44 23.0 years
Whenever a player casts a creature spell, that player adds 
.
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Cards similar to Tangleroot 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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"At the beginning of each player's first main phase, that player adds ."
."
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"At the beginning of each player's first main phase, that player adds ."
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"At the beginning of each player's upkeep, that player adds . Until end of turn, they don't lose this mana as steps and phases end."
. Until end of turn, they don't lose this mana as steps and phases end."
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"Whenever you cast your first spell each turn, add 
."
."