With the new Shaman minion Instructor Fireheart I've got idea about new apprentice card. Of course they will not delete the old apprentice and replace her but I think this would be interesting replacement. Maybe unplayable in the end but eh.
That's a pretty cool idea, although it has negative synergy with The Fist of Ra-den.
Thnx, but I think Shaman would get too much punished either way, his spells already have overload so, he would overload full time even with few spells, maybe I would also make it replace any current overloads on card with overload (1) (while you have it on board), still punishing a lot. In the end the minion should make casting spells easier and reward you somehow. For mage this just fixes their super turns.