Ohhh! I see! Well, nonny, we don’t know much about the early Wardens, given that hey lived 1000+ years ago, and there really doesn’t seem to be much in the way of archaeology in Thedas. But according to the DA:RPG Source Books (which is where I get all my tastiest lore—seriously, if you’re a canon hound like me, you’ve gotta pick up the RPG box sets), the Wardens got the idea for blood drinking from the peoples of the Donarks, specifically a man (elf?) named Nakiki, who suggested drinking the blood of one’s foes was a way to gain their strength.
I don’t know how much further the similarities run than that, but a side note you might find interesting: with its sweltering jungles and ancient stone pyramids rising from the trees (not to mention an occupying force of invaders with more advanced weaponry than the indigenous peoples) Par Vollen sounds much like it’s patterned after the Yucatan peninsula.
But never mind that, because: omg omg omg mysterious cities of gold
Damn I love that show. I saw it for the first time last year, and it’s surprisingly culturally accurate (Well, for the 1980s. And for being a kids’ show. With aliens. And flying golden condors.)