Daily Quest Help Guid.
So far, i have only found out where to get two of the dq weapons.
Sludge Sword: Boss in sewer.
Hot Magma Axe: Red Dragon

Hint: While hunting down these rare items, and you are on the boss, do not use any skills, or use them and never get the gosh darn thing!

And no matter what they say, Sludge sword only sells for 250 gold!