Historical Rules · 8 July 2022
Rule 702.143d
Official source text from the 8 July 2022 Rules release
If an effect states that a card in exile becomes foretold, that card becomes a foretold card. That effect may give the card a foretell cost. That card may be cast for any foretell cost it has after the turn it became a foretold card has ended, even if the resulting spell doesn’t have foretell.