Siege at Firemoth is an official plugin that adds a small island chain southwest of Seyda Neen, and a small quest involving taking out a large army of skeletons. Unlike most areas in the game, this place is very combat-oriented—you may find yourself facing dozens of enemies at one time. At the end, you will face Grurn, the leader of the island's undead, and a powerful lich to boot. You will be rewarded with the Ward of Akavir, a shield with a constant effect Fortify Luck enchantment.