So I recently acquired 500 Eridium and I decided to spend it the only reasonable way possible: by feeding it to a Pandoracorn. As most of you know, Tiny Tina’s Assault on Dragon’s Keep introduced Butt Stallion, a rather… unique way of getting loot. By feeding her 5 Eridium, Butt Stallion ‘‘drops’’ an item which can range from ammo to a legendary weapon. It should be noted that she is the only source of Gemstone weapons. These guns have a unique skin and slightly increased stats. I fed her 500 Eridium in one sitting and here are my results:
Green - 37
Blue - 24
Purple (without the Gemstone skin) - 2
Gemstone - 21
Cash - 8
Ammo - 6
Health - 2
It should be noted that Butt Stallion can drop legendaries (it happened a long time ago for me) but that didn’t happen during this run. She only seemed to drop guns. Shields, relics, class mods and grenades were absent. During this particular run, her chance to drop a Gemstone weapon was 21%. I decided to keep a closer eye on the Gemstone weapons and the results were quite surprising:
Pistols - 16
SMGs - 2
Shotguns - 2
Assault Rifles - 1
As you can see, the amount of Gemstone pistols was over three times higher than that of the other weapon types put together. Farming for a specific non-pistol Gemstone weapon is probably going to take a lot of patience and Eridium.
It should be noted that this test was conducted with a level 61 character. It is possible that the quality of loot might differ between different character levels though I’m not a hundred percent sure on that.
So anyway, these were my results. I haven’t found any statistics on Butt Stallion’s drops from these forums and on the first few pages of Google search. I will try to farm her again once I acquire 500 Eridium. If you have an excessive amount of Eridium like I had, give Butt Stallion farming a try and post the results!