Darksun Shield is a unique heavy shield used by Ano Vando, who can be found roaming outdoors in the city of Ald'ruhn. If equipped by a vampire it rapidly damages the wielder's health and the following message is received:
You feel a searing pain on your arm as you equip the shield. A voice screams out in your mind, "This is not for your kind, Dark One.
Enchantment ID: darksun_en
Ano Vando can only be found during "The Vampire Hunter" quest, which is available exclusively to a vampire Nerevarine who is a member of Clan Aundae. This shield is otherwise unavailable during regular gameplay.
On the PC, it can also be acquired by using the console command:
Player -> AddItem "darksun_shield_unique" 1