Crest of Supremacy

Crest of Supremacy is a large red shield that has the bonuses of stamina, intellect, and mana regen. If a player is lucky enough to find one then this shield can last them until at least level 60.

Source
Crest of Supremacy drops from Shade of Eranikus in the Temple of Atal'Hakkar. The drop rate is around 18%.