Walnut
A wood full of adaptability, it is found often in the hands of creative and inventive individuals. Walnut wands want to be used, because of this they will perform any spell their master wishes. While this is great for new witches or wizards, it can lead to use of the dark arts, if the wand core is susceptible to such things.
Rougarou Hair
Most often found in the hands of an animagus, wands with a rougarou hair core reflect the duality of the witch or wizard who possesses them. This wand core tends to favor transfiguration spells, almost as if it wishes to change its own shape as easily as it changes others.