Rise of the Dread Marn

Because exiling a card with foretell from your hand is a special action, you can do so any time you have priority during your turn, including in response to spells and abilities. Once you announce you’re taking the action, no other player can respond by trying to remove the card from your hand.

The number of nontoken creatures that died that turn is counted as Rise of the Dread Marn is resolving. In other words, nontoken creatures that die in response to Rise of the Dread Marn will count.

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.