Just as every other year, the gathering of heroes from different lands does to do war and politics and magic apocalypses, does not go without disturbing the local magical wildlife. Vicious or mysterious spirits, banshies and wraiths will be lurking in the woods, bewildering Fae will be confusing the unsuspecting insurgents. 

In general, expect some fewer creatures. Dealing with most of them would require communication and wit, rather than force, although some might be prone to attack. Do not forget to be gentle to the non-playing characters.