You can embed focus components required for your spells into your body.
Prerequisites: Con 13, dragon type, ability to cast spells.
Benefit: You can embed the focus component for a spell you know how to cast into your skin or hide and use the embedded focus anytime you cast the spell. You can embed a number of focuses equal to your Constitution score.
Special: The total value of expensive spell focuses a dragon has embedded in its hide should be considered part of the dragon’s treasure.
Source: Draconomicon, page 69.