Swashbuckling Arcana (2002)

From the publisher's website:

Thean sorcerers gain their magic through ancient bloodlines, inherited from distant ancestors who struck a terrible bargain for power. But theirs is not the only mystic power in Theah. Alchemists conduct their experiments in lonely towers while druids and shamans draw from the strength of the human soul. From dark monsters hidden in the shadows to forgotten artifacts of the extinct Syrneth, magic is all around. You just have to know where to look. Includes rules for new magic systems, including new prestige classes, new information on the Sidhe and on the mysterious Syrneth, and an extensive description of magical artifacts and locales, suitable for any fantasy campaign.