Embed Spell Focus
(Draconomicon, page 69, DnD 3.5)
[Monster]
You can embed focus components required for your spells into your body.
Prerequisite
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.