Aurelia is located in Blackbarrel Cellars on the planet Eden-6.
You can farm Aurelia for these legendary weapons as it is the dedicated loot source for these items. Aurelia has a 30% legendary drop chance.
Aurelia also drops ‘The Ice Queen’, this is a unique Jakobs Sniper Rifle. Its special ability is that it ricochets 2 projectiles instead of 1 when you score a critical hit. Another unique thing is that this is a Jakobs weapon with elemental damage. Of course ‘The Ice Queen’ deals Cryo damage.
Aurelia is a Ice Queen and therefore she will use Cryo attacks and takes reduced damage from Cryo based attacks. Aurelia has a lot of Area-of-Effect attacks. Watch out for snowballs and whirlwinds.
Aurelia can hide herself in a block of ice. When she does this, she will restore her shield. Quickly shoot the ice block to prevent her from regenerating.
There will be some COV enemies during this fight. However, their damage output is very low and therefore can be ignored. They are helpful to gain a second wind.