  The wooden Core gives a wand one of three personalities, felt as a swing in its power.
<~><~>  Wandering cores, such as Dark Oak, Spruce, Bastion and Evermore, grow stronger in a freshly entered biome and weaker if they linger too long in one place. Keep moving.
<~><~>  Adventurous cores, such as Jubilee, Vermilion, Jungle and Acacia, reward a varied spell list and sour if you cast one spell over and over. A couple nights of sleep clears their memory.
<~><~>  Every other core is Ambivalent, with steady power and no moods.
