Ash
Truest loyalty can be found in ash; these wands are not meant to be passed to another. Practitioners that use ash wands are stubborn in their beliefs, but fiercely loyal to one thing above all else. Whether that be person, cause, or ideal witches or wizards with a wand of this wood will remain loyal to the very end.
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.