I did not write this campaign, exactly, but edited it severely from the original by Oreb. It is the third campaign set in the World of Orbivm, and was written in the second half of 2007, published at the beginning of 2008.
The plot of this campaign revolves around the life of Vaniyera, Shadowdancer and Thunderblade. It only includes the first major events of his life – the invasion of the Sidhe forests by the Lavinian Legion.
To play this campaign, download the Battle for Wesnoth and then go to the “add-ons” menu. Find “Epic of Vaniyera” in the list and download it. Then, when you restart Wesnoth, go to the “campaigns” menu and the Epic of Vaniyera should appear at the bottom.