If you want, you can dedicate your new cards with a little ritual using incense.
Try lighting some incense—Frankincense works great—and sprinkle a bit of an herb like rue, betony, cinquefoil, burdock, elder, lavender, marigold, mugwort, or wormwood.
When you’re done, you can burn the herb with the incense, drop it into a candle flame, or just tuck it into the box where you keep your cards wrapped in a cotton cloth.
The color of the cloth is up to you, but black, yellow, and purple are all popular choices, depending on your focus.