Shambling Cubes

[Kesselring]

So using the Search feature and google. I have found nothing. A few old posts of this guy saying he killed a few cubes by the traitor in Skyshrine and got nothing. These ones by the traitor was pretty low level compared to deeper into the dungeon. Do ALL cubes have the same loot table? Or am i to understand that it's not all cubes and it's just the ones that are deeper in the dungeon that have that loot table. Also from what I read on older forums, they are supposed to flee at low HP. When I FD when it is less than 20% it does actually flee, but not while I'm fighting.

What's the low down on these things? I'm trying to get a coin purse atm and don't really wanna waste my time.