Hazoret's Undying Fury

If more than one spell says that lands you control don't untap during your next untap step, the effects will all wear off during that untap step. You'll untap lands you control during your untap step after that one.

If you cast any of those cards, you do so as part of the resolution of Hazoret's Undying Fury. You can't wait to cast them later in the turn.

If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs, such as emerge costs. You can, however, pay additional costs. If the card has any mandatory additional costs, such as that of Tormenting Voice, you must pay those to cast the card.

Each individual spell you cast this way must have mana value 5 or less. Their total mana value could be greater.

No player may take any actions between the time you shuffle your library and the time you exile the top four cards.