|(1) If he brings less than the 100 elves required, he has to start over. Because Sylvan troops under his command constantly desert, assembling 100 elves can be challenging as they will desert on the long trek back to the underground.
||(2) He can successfully bring the 100 elves required, in which case the Shadow Dragons remove themselves as an obstacle, opening a "back door" to the Sylvan city he must capture. The overland route involves heavily guarded garrisons which can be difficult or impossible to take early in the game.
||(3) Finally, there is one movie which does not appear in the game, where bringing 100 elves results in the reward of a powerful artifact. This may be the intially intended outcome, and is alluded to in the Shadow Dragons' initial offer.