Malvas Relvani orders you to help Archmagister Rilvin Dral complete a vital experiment. The catch however is that you need to meet him within a day. The Archmagister's tower, Tel Thenim, is located in Port Telvannis, so it's fairly easy to achieve this. A strong Levitate spell is recommended as always in Telvanni housing.
Once you meet with the Archmagister, he requests that you allow him to teleport you into his newly created realm. Upon arrival, your breath starts to run out, although whether this is due to being underwater or in a vacuum isn't clear. There is no need to use any water breathing spells: after 17 seconds, the Archmagister will teleport you back.
The following Journal ID and Index codes can be used with the Journalconsole command to manually update the quest to a certain point.
Uncharted Waters (TR_m1_HT_Dr2)
Index
Finishes Quest
Journal Entry
10
Malvas Relvani ordered me to help Lord Dral complete a vital experiment. I should find Archmagister Rilvin Dral in his tower, Tel Thenim, here in Port Telvannis. I have only one day to complete this task, as Lord Dral needs help immediately.
20
I found Archmagister Dral in his tower, and he told me he would begin his experiment shortly.
30
After casting a spell to "see through my eyes", Lord Dral teleported me to a new 'Pocket Realm' that he was crafting. Inside, I was trapped underwater, in open sky. Before I drowned, Lord Dral teleported me to safety.
40
Lord Dral seemed impressed with his new creation, and rewarded me with a Daedric dagger.
41
Finishes quest
Malvas Relvani thanked me for helping Lord Dral.
45
I have failed to reach Archmagister Dral in time for his experiment. Malvas will not be happy.
46
Finishes quest
Malvas Relvani was infuriated that I had failed to reach Archmagister Dral in time.
50
Finishes quest
Malvas Relvani ordered me to help Lord Dral test a vital experiment. However, I refused to help Archmagister Dral complete his experiment. Malvas was disappointed, but I did not want to risk my life in a powerful Telvanni Lord's experiment.
55
Finishes quest
Apparently, Lord Dral is no longer interested in his once vital experiment.