Widow's Remorse

Widow's Remorse is a one-handed sword. Primary for tanks due to the armor, stamina and speed.

Source
Widow's Remorse drops off Grand Widow Faerlina in Naxxramas with a drop rate of approximately 20%..

Trivia

 * It was personally used by Faerlina herself.
 * Torment of the Banished reuses this item's appearance in the new Naxxramas.