Whenever you buy a new tool for magical workings it is important that the tool is purified. This is a simple purification ritual that I use to cleanse my new magical tools:

Ingredients:
caldron or any heat-proof dish
dandelion leaf
wormwood
sage

Ignite the herbs and let them smolder awhile. As the smoke curls about you pass your tool through the smoke and say:

"Smoke rise,
Let me be wise.
This (name of tool) is cleansed.
I will use it only for good."