The magic of the earth flows through your bloodline.
Prerequisites
Giant Bloodline (Stone Giant), Skin of Stone, bloodline level 3rd.
Benefit
You gain a +1 racial bonus to your caster level when casting spells with the [earth] descriptor.
If you have levels as a sorcerer, for every three Gigantic Feats you possess, you add a new spell known of a spell level you can cast. This spell must either be from the abjuration or divination schools or have the earth descriptor.