A dagger is thrown at a monk. On that attack, the dagger multiplies into 2 or 3 daggers in mid-air, each dagger with its own rolls for attack and damage. The daggers move one after another such as a line like:
— — —
As a reaction to that one Attack action, can a monk use Deflect Missiles to deflect all of those projectiles, since all of them were thrown on a single Attack action and will be arriving simultaneously?