Shadow Sword

The Darkness Sword is a cursed sword that appears in Fire Emblem: Gaiden and Fire Emblem: Thracia 776. In the latter, it was given to Mareeta by Leidrick, which caused her to attack anyone at sight, including her foster mother, Evayle. Cyas later dispelled the curse off the sword, bringing Mareeta to her senses. He then recommended that she use the sword, which became Mareeta's Sword.

FE2
Might: 13 Hit: 70 Critical: 0 Range: 1 Weight: 5 Effect: User may inflict damage upon themselves

FE5
Weapon Rank: * Worth: - Might: 11 Hit: 70 Critical: 20 Range: 1 Weight: 6 Uses: 60 Effect: Mareeta only, allows 2 consecutive hits, gives Awareness skill