One shadow signature in the text box of your Artist Proof. The base color and “shadow” color can be any color you request.

Base color recommendations: Gold, Bronze, Metallic Sapphire Sharpie (sky blue), Metallic Emerald Sharpie (green), Metallic Ruby Sharpie (a pinkish red), Silver (my least favorite option).

Shadow colors: This can be just about anything! Eric will let you know if he doesn’t have it—but he has a sizable collection.

If it is a red/blue card, it looks really nice with a gold base with a red/blue combo shadow. Check out the photo here for an example. Eric can do this for any mana color combo.