Part of the story of my campaign world is that it was nearly destroyed in the not terribly distant past. This destruction was due in no small part to the reckless wielding of powerful magic. In this world I’ve taken the stance that life and magic are intertwined, and in essence equate to the same thing. And so very powerful magic can endanger the planet itself. During the time of the cataclysm, a dangerous feedback loop was created and ley lines of magical energy erupted and criss-crossed the globe, leaving a path of destruction in their wake. The places where these lines crossed one another are known as nexus points; sacred locations where magic is particularly sensitive.
So, what does any of this have to do with druids? As protectors of life, they are keenly interested in preventing another global catastrophe like the cataclysm. To this end, druids work to actively suppress the use and proliferation of arcane magic. This is not to say that they hunt down and kill everyone who can wield arcane magic (although several rumors do tie druids to the disappearance or untimely death of more than one spell-caster who was particularly powerful), but it does mean that there are no formal institutions like wizard’s colleges and that magical tomes are somewhat difficult to come by. In fact, druids often take it upon themselves to destroy such books, and some druidic orders even destroy other magic items as well, often during religious ceremonies that take place in sacred groves.
The most sacred of druid groves are of course on nexus points, those magically attuned areas where multiple ley lines crossed one another during the cataclysm. If one knows the way, certain spells cast at these locations can have a heightened effect (especially divination and travel type spells, but this is getting into a different topic). Also, the druids have learned that destroying powerful magic items at these locations, under the proper conditions, has a rippled healing effect across the whole world, sending energy out across the ley lines to bring life back to the barren areas still scarred by the cataclysm.
So, druids in my campaign world are on the surface very much like a typical druid out of the player’s handbook: they are nature loving champions of neutrality who promote the spread of healing and life across the world. However, they also have a less well known agenda (one that may have ramifications beyond what they are aware of), and perhaps there are those within their ranks who have done terrible deeds in the name of the greater good.