>>16462876Fire Gem, along with every other non-Normal Gem, were removed in Gen 6.
There honestly really isn't a good way to abuse Magician, Delphox is a little too bulky to rely on focus sash steals, and pinch berries require you to be at 25% (or sometimes 50%) health. Sitrus might be workable, as it effectively gives you 4-5 turns worth of leftovers all at once, and Delphox doesn't often live longer than that, and it activates at 50%. Gives you some wiggle room to steal items, but otherwise, there's no real way to use Magician.