Morrowind:Denstagmer's Ring

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Artifact: Denstagmer's Ring (ring_denstagmer_unique)
Type	Ring
Statistics
Weight	0.3	Value	12,000
Enchantment
Constant Effect     Resist Fire 30% on Self     Resist Frost 30% on Self     Resist Shock 30% on Self

All that is known of this Ring is that it may grant the user protection from certain elements. Even the name Denstagmer is a mystery. —Yagrum Bagarn, Tamrielic Lore

Found in the Falas Ancestral Tomb (just south-east of Gnisis) in the urn on the altar labeled D. Byrant.