Miller, Street Sleuth

When Miller enters, reveal X cards from the top of your library, choose and exile one of the cards revealed this way, you may cast it as long as it remains exiled. Put the rest in your graveyard.

Whenever you reveal one or more cards, investigate if this is the first time this ability has resolved this turn. If it's the second time, surveil 2. If it's the third time,
Miller gains "Sacrifice a Clue: You may return a permanent from your graveyard to the battlefield with
mana value less than or equal to