Rosheen, Roaring Prophet (Modern Horizons 3 434) - Rare Magic: The Gathering Card

When Rosheen, Roaring Prophet enters the battlefield, mill six cards. You may put a card with in its mana cost from among them into your hand.: Reveal any number of cards with in their mana cost in your hand. Add for each card revealed this way. Spend this mana only on costs that contain .