I have two so far, but I'd like to get a couple more if possible.

It's $15 plus shipping for a custom Glow Necklace made just for you! (These average between $25 and $40 when they sell elsewhere, and you get what they give you.) Normal jewelry commission elements are available including wirework, fangs/claws, and gemstone/crystal beads.

You have a choice between Round and Heart-shaped in silver or bronze, or a glass bottle for the pendant and red/green/blue/purple for the glow effect.