Crescendum

You brandish your body or summon a distinct martial weapon in your hand that inherent’s its Weapon Mastery property. Make a melee spell attack against one creature or object in range of that weapon’s range. On a hit, the target takes 1d10 Force damage.

If used to brandish your body, it counts as an Unarmed Weapon attack and melee spell attack for all intended purposes. 

Cantrip Upgrade. The spell creates two attacks at level 5, three attacks at level 11, and four attacks at level 17. You can direct the attacks at the same target or at different ones. Make a separate attack roll for each attack.