Mantles of Ultramar
From Warhammer 40k - Lexicanum
The Mantles of Ultramar are relic suits of Artificer Armour owned by the Ultramarines.[1]
Said to number only seven, it is said they were discovered in a pre-Dark Age of Technology derelict ship discovered on the Eastern Fringe by Ultramarines Chapter Master Theokista Weir. They have since protected many honoured warriors of the Ultramarines and were issued only at the decree of Roboute Guilliman.[1]