Altar of the Flame Ritual

When Altar of the Flame Ritual enters the battlefield, draw three cards, then discard
three cards.
{2}{r}: Exile the top card of your library. Until
end of turn, you may cast that card.
"Noodles was staring to the dancing fire, and the only thought that came to his head was: 'I'm hungry'"
- The Outstanding Adventures of Noodles