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The last hearthstone adventure explores Orsis , Uldaman and the so called Ruined city. I know the first two do exist in WOW but what about the last one?
The Ruined City seems to be a reference to the Sunken City of Vashj'ir in World of Warcraft.
This is supported both by all the enemies being water based and one of the Hearthstone bosses being Lady Naz'jar, who is one of the bosses of the Throne of Tides dungeon in WoW's Vashj'ir zone.
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