Kind of unfair, since I had a head start
There has been a bit of talk about an interesting legendary weapon in Borderlands: The Pre-Sequel that is in plain sight, but unavailable at first. Excalibastard is stuck in a stone in the area Stanton’s Liver, and only those badass enough can pull it out. At first, there was only speculation, but the community went in and tinkered with the code to find out that it requires at least 2500 badass points to pull, which is somewhere between one and two times through the campaign, depending on how much variety a player employs.
I played around with it for a few minutes to get a feel for it, and it is one of the “railgun-like” laser weapons that feels more like a sniper rifle. Naturally, being named after a mythical sword, it comes with a pretty long blade. It is 100% accurate, and has the cryo element. The Borderlands wiki reports enemies killed with it also explode with a cryo nova, though I did not experience that with my limited time using it.
Check out my screenshots to see it in action.