Magical barrier

A Magical Barrier (or shield) can be used by one, or many Magicians, to separate themselves within crowds by acting as a physical/magical repellent, it can be translucent or made into a bright light, and can be made away from the Magician.

Limits
It can protect whoever, or whatever, is in it from both Magical and physical projectiles provided the casters magic is strong enough to hold against the blow, or depending on how the Magician(s) have prepared it, e.g. Sonea in 'The Magicians Guild', during The Purge, was able to penetrate a fairly powerful magical barrier, made with the combined magic of several Magicians, that could repel physical objects and presumably people, with a magically infused stone, due to the shield not being prepared for a magical encounter.