Lusacan is yet to be found and corrupted by the darkspawn and therefore still slumbers. Following the defeat of Urthemiel in the Fifth Blight, he or Razikale appear to be the next Old God in line to be transformed into an Archdemon and start the Sixth Blight.
He is the Tevinter Dragon of Night. Worshipped by the Tevinter Imperium, Lusacan, like his siblings, is an enormous draconic figure of immense power. He has yet to be corrupted by darkspawn. Lusacan is expected to be the sixth or final Archdemon.
Like the other Old Gods, Lusacan endorsed the ancient Tevinter Magisters' attempt to reach the Golden City and spoke to the High Priest of Lusacan, who used the alias, "The Watchman of Night" and told them to join in the endeavour. 
The ancient Tevinter associated the constellation "Tenebrium", depicted as an owl, with him.
Despite the rise of the Chantry, worship of Lusacan has continued, even into the modern Dragon Age. The most recent notable group was a cult known as The Last Moon which abducted and ritualistically murdered multiple individuals during the Grand Tourney of the Free Marches in the early Dragon Age, before attempting to destroy the tourney grounds during the finale of the grand melee. 
- ↑ Dragon Age: The World of Thedas, vol. 2, pp. p.56-57
- ↑ Dragon Age (tabletop RPG), Game Master's Guide Set 2, p.42