From publisher blurb:
Does the very land hold a life force that can be sucked dry, just as a vampire drains blood from his victims? There is an ancient art that is resurfacing. A terrible lore that allows spell casters, both Arcane and Divine to rape the land of its very life to fuel their magic. Blight Magic, it is called and it is a quick and terrible road to power. Many have justified the use of such magic, pointing out that farmers take from the land to feed the people, homes have need of the land to be built, and trees are cut down to provide warmth in the winter! Is this so very different? The answer can only be seen in the practitioners, who suffer over time from a corruption that only and evil power can bring.
Blight Magic is a d20 source book that details the rituals, spells, abilities, and terrible corrupting influences that can be gained by tapping into, and draining the very life from the land. This 56 page book has rules for new rituals, spells, prestige classes, feats, and much more that all focus on this awful power.
Let your players dive into this quick road to arcane might and see if they have the strength to resist the terrible temptation and awesome power of Blight Magic.