TREES in EASTERN KOS

The heath-strewn and cloudy fields above the River Kos are dotted in places by single ash trees and stubby poplar groves.
In ancient times, fair villas stood beside them, and each tree was worshiped as a nymph, kissed and serenaded by young noblemen, and wine was poured upon the roots.  It recent eras, the villas have long collapsed to dust, and the spirits in the trees have grown neglected and melancholy.
In most cases, the spirits will manifest themselves in no form more severe than sad dreams of longing and the faces of lost loves to anyone who seeks shelter (perhaps from the many short, whipping rainstorms of Kos) beneath their poor boughs.
However, there is a 20% chance the tree still contains a live Wood-Elf or Wood-Wose, who may present him or herself to the party.
In most cases, their interest will be malevolent, or at least capricious, but there is a chance that a party on the run from dangerous monsters may find themselves aided by a sudden flurry of elf-arrows.
What the elf demands in return for their unsought aid is another matter entirely.