Rosheen, Roaring Prophet 


Legendary Creature — Giant Shaman
When Rosheen enters, mill six cards. You may put a card with {X} in its mana cost from among them into your hand.
{T}: Reveal any number of cards with {X} in their mana cost in your hand. Add {C}{C} for each card revealed this way. Spend this mana only on costs that contain {X}.
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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.
Terra, Magical Adept // Esper Terra 96%
$2.27#5470
"When this card enters, mill five cards. Put up to one enchantment card milled this way into your hand."