Crypt Feaster

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

• WWizards of the Coast2024-11-08
  Official Ruling
  Crypt Feaster's threshold ability checks your graveyard at the moment it would trigger to see if you have seven or more cards in your graveyard. If you don't, the ability won't trigger at all. If it does trigger, the ability will check again as it tries to resolve. If you don't have seven or more cards in your graveyard at that time, the ability won't resolve and none of its effects will happen.

Rulings via Scryfall