The Infamous Cruelclaw

• WOTC Official Reminder Textofficial rules
  Menace — This creature can't be blocked except by two or more creatures.

• WWizards of the Coast2024-07-26
  Official Ruling
  You cast the exiled card while the ability is resolving and still on the stack. You can’t wait to cast it later in the turn. Timing restrictions based on the card’s type are ignored.
• WWizards of the Coast2024-07-26
  Official Ruling
  Since you are using an alternative cost to cast the spell, you can’t pay any other alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.
• WWizards of the Coast2024-07-26
  Official Ruling
  If the spell you cast has in its mana cost, you must choose 0 as the value of X.
• WWizards of the Coast2024-07-26
  Official Ruling
  If you choose not to cast the exiled card, it remains in exile.

Rulings via Scryfall