Nature's Wrath

Not all wars are won through battle. It is said that the most powerful of druid's have achieved such a communion with their beloved lands that the land itself answers the call of nature's valiant defender, and armies tremble.

Once a druid is attuned to a particular locale, she is able to start a communion with the land itself against those that wish it harm. The druid performs a spell-like ritual in which she spends at least 4 hours a day in meditation and communion with her 'land'. Upon completion of the first day, she calls down the power of the forest, effecting large groups of creatures or humanoids (I was thinking ~100, but not sure it needs quantified). The plagues grow worse on each subsequent day that the druid performs the ritual, and previous plagues persist.

Days 1 and 2) Swarms of insects begin to harass the invading group. Mosquitoes in swamp-like areas, Bee-s in the forest, scorpions in the desert, etc. Days 3 and 4) Harsh storms begin to wrack the group by night, making sleep difficult. Insects still plague during the day. Days 5 and 6) Foodstores begin to spoil and game becomes sparse. Natural fruits and nuts of the land are very rare to find. Days 7 and 8) Carried water begins to become tainted, and the group has trouble finding natural water

At the end of each even numbered day members of the group must make a Con save (DC determined by the druid's spell save) or suffer a level of exhaustion. This save must be made every day after day 8 or suffer a level of exhaustion. - Vulash