Monte Cook, the man who needs no introduction, has announced that they will release a small, PDF sourcebook on October 1.  The Earthblood sourcebook introduces forms of magic, abilities and feats based around drawing power from the land itself.  According to Monte:

Earthblood is an 11-page product with a new fun tool for both DMs and players to play around with called Earthblood–it’s literally the power that runs through the earth itself, and your characters can tap into it with new feats, spells, and magic items. It’s a great way for DMs to explain why there are so many subterranean creatures in their campaign, and a fun excuse to put more weird stuff underground. And best of all, it’s free.

In addition, Malhavoc Press (Monte’s game company) will put everything on DriveThruRPG and RPGNow on sale at a 25% discount.  Might be a good time to pick up some great expansions for your D20 based game…