"The people of Xiansai worship fifty-nine gods, but few are more revered than Zei, the exiled trickster god who travels the face of the world, disguised as a humble merchant. Tales of his adventures range from ingenious thefts and practical jokes to more... lurid exploits, none of which I am comfortable recording here."— Abd al-Hazir(src)
Xiansai is Sanctuary's northernmost nation. Its mountain ranges are littered with arcane repositories and an untold number of magical artifacts, leading some to suggest that Xiansai's people have practiced magic for millennia.
Mages from the Yshari Sanctum visit Xiansai every few years in search of prodigies that they can train in their specific vocations. The Xian who return to their homeland as full-fledged mages are highly sought after by the Great Families to fill the ranks of their personal armies.
Xiansai distanced itself from the Sin War, Mage Clan Wars, and other notable conflicts that plagued Sanctuary. However, the island has seen its share of civil strife. Many of its internal wars originated from the political maneuverings of the Great Families.
Xiansai technically appears in the world map in the manual for Diablo II, but is unnamed.
- The name Xiansai seems to come from the nomenclature system of Chinese cities. In China, "Xi'an", assuming there are two syllables, is a capital city which means "Peace in the West". The pronunciation of the word "Xi'an" in Mandarin Chinese, written as "西安", sounds like "see-anh" in English. However logically, "Xian" ought to be shown as only one syllable and should be pronounced like "see-ann" in English. Quite possibly, the syllable "Xian" refers to the Chinese Character "仙", which means an immortal or being mysterious if it is an adjective. The syllable "sai" means fortress, written as "塞" as a noun. Therefore, the word "Xiansai" means "The Fortress of the Immortals" or "The Mysterious Fortress".
- "Xiansai" is perhaps an anagram of the word "Asian" plus the letters "x" and an additional letter "i"; this is not related in Kingdom Hearts which has Organization XIII to have anagram with letters x added.