huh?

look behind guts in this pic .... there is a gauntlet holding a sword ..... what is this? whos sword and hand is that? .... i have the blue/aqua(first release) caped one and it didnt come with anything but his sword, an extra head, a dagger and a platform to stand on .....

It looks like a variant.This hand has to be the severed hand of some guy Gatsu met on the battlefield.