Chaikata asked you to rescue Kikananta who was captured by the Mist Mane tribe. But, Kikananta was only pretending to be captured to prevent the Mist Mane tribe from opening the Abyss Gate. With the information he gave you, you defeated Visionmaster Omutata, and got the key needed to enter the Abyss Gate, and returned to Chaikata to report the situation. When you returned to Rikesh, he suggested you report it to the Fortress. So you returned to the Fortress and reported your discovery to Centurion Vili.