Elinas, You did not use the Dark One's Own Luck yet.
The four heroes sneak down the ravine, using its scant cover to protect them from watching eyes. At the very western edge of the woods they peer into the trees. In the dim moonlight three Trollocs are visible. Two stand near the southern end of the copse, keeping close watch on the hedgerow. A third sits in the middle of the trees, twenty feet from his fellows and twenty feet from the four watchers.