Imperious Set

The imperious set is worn by the Imperious Knights that once attempted to conquer the undead crypt, they can be identified as giant knights that hold two halves of a broken shield and can be found in the undead crypt. Initially you will encounter two of these knights however in new game plus an additional two will spawn. Upon death however the additional two do not respawn.

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The imperious set can be dropped by the imperious knights, there is no way to aquire the entire set at one time, as the knights drop only one piece at a time. Wearing the gold covetous ring + 2 can be helpful in aquiring the entire set.