Helldritch
Hero
It is 5ed. In my Greyhawk campaign, dwarven wizards have always existed but they are now starting to show up in the world. Before then, they were mainly there to enchant weapons and armors. The same logic applies to the other races with rare classes. One exemple is the Valley elves. I give them the exact same abilities as those of the drow. Bad mouthed Gray and high elves Say that the drow were following the same road as the Valley elves, thus the mistrust that the elves have toward those elves from the Vale of the mage. With a bit of thinking it is possible to justify juste about anything.