Unversion Stigma

As you all know by now, the Unversed are one of the main enemies in the Kingdom Hearts universe and to be specific, during the Birth by Sleep timeline.
If not, allow me to explain further; spoilers warning.

The Unversed are manifestations of Vanitas's(the dude who looks like Spiderman) raging emotions; negative ones to be exact.
They are characterized with navy blue skin with red glowing eyes, hence where this Keyblade got its design from.

I do not own Kingdom Hearts Birth by Sleep.