Sure!Remove curse works, break enchantment works with a level check (DC = HD of the unseelie faerie)?
Undead faeries are incorporeal phantasms of their former selves. Their eyes have no pupils—only blank, white-hot glowing orbs that seethe hatred.
Undead members of the Unseelie Court come into being when a faerie (of any alignment) dies in a battle between the two courts. The horror of kin slaying kin creates a ripple through the Seeming itself, preventing the deceased faerie from dissipating into it. The creature’s spirit becomes trapped, sentenced to eternally walk the Shadow World but stripped of the magical abilities it once had. It becomes an unthinking being, lashing out in anger and resentment at the living, held in check only by the Dark Queen.
Undead faeries close to melee range as quickly as possible. The touch of such a creature chills the blood and clouds the mind. For each successful hit, victims suffer 1d8 points of damage and lose 5 points from their perception score. Undead faeries can be hit only with iron or +1 or better weapons. They are vulnerable to holy water, which inflicts 1d6+1 damage points per vial. They can be turned as spectres.