Robe of Trials is a generic robe that is enchanted with Destruction magic.
Enchantment ID: helljoint_en
Both effects are 10 points for 30 seconds on touch:
This robe was intended to appear as leveled loot, however the object associated with it was not placed in Morrowind. Therefore it can only be obtained on PC by using the console:
Player -> AddItem "robe of trials" 1