Ethereal Valkyrie

Because the card in exile becomes foretold, you can look at it in exile. (Most effects that have you exile a card face down don’t allow you to look at the card in exile.)

If you foretell a modal double-faced card, the foretell cost will be based on the mana cost of the face you cast from exile. For example, if you foretell Kolvori, God of Kinship/The Ringhart Crest, you could cast Kolvori by paying {G}{G} or The Ringhart Crest by paying {G} on a future turn. If you foretell a modal double-faced card whose front face is a nonland face but whose back face is a land face, you can’t play that card as a land.

If you’re casting a foretold card from exile for its foretell cost, you can’t choose to cast it for any other alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, those must be paid to cast the spell.

The reduction of the foretell cost applies only to generic mana in the foretell cost. It can’t reduce requirements of specific colors of mana. For example, if you foretell a card in your hand with mana cost {1}{G}{G}, its foretell cost will be {G}{G}.

Although the card you exile becomes foretold, you did not foretell it. An ability that triggers whenever you foretell a card will not trigger.