Split post cuz my phone is acting up. It would be different because its a make magic but the idea of a glowing construct is about the same. It would look more like the construct im trying to create. The bigger the construct the less stable it will probably be but smaller objects like arrows would have a density similar to their real counterparts. 

Also im not sure what this little thing i need to change is. Also not clear if the magic was accepted, tweeked or flat out denied