Map to Everhaven

{t}: Look at the top three cards of your library.
You may reveal one of them and put it into your
hand, then exile any number of them and put the
rest back on top of your library. Put a track
counter on Map to Everhaven.
When there are six or more track counters on
Map to Everhaven, exile it and target land.
"They're here."
- Ordaniwen's journal, entry 23