I'm Slytherin House and my character is Muzan so I would think Dark Wizard.Answer:
The object that vanishes comes back in exactly the form it comes. So if its thrown at you and you vanish it, if you dont move, it will come back with the same speed and angle to go hit you again.
Alright, before we proceed, did LoK tell you if you were a Light Wizard or Dark Wizard? this affects what Dark Arts and Defence against Dark Arts spells you can use