I need some input regarding the correct use of the Wizard (Universalist) Special Ability. Does the Wizard have to be proficient with the weapon in his hand to use this ability in a combat encounter? It seems that if not, that this ability could quickly become broken in certain situations.
Example: Harry Potter, the party's Wizard 1, is carrying around in his hands an Earthbreaker (a weapon he is not proficient with). The party enters combat, and although he isn't proficient with said weapon, using the "Hand of the Apprentice" ability, the weapon leaps from his hands to strike a target within 30 feet for 2d6 bashing and piercing damage, returning to his hand after striking out.