"Mutation" button under appearance?

[Btabc]

I noticed today (just a few minutes ago) when I was inside the "appearance" customization of my warframe there was a new button?  It's labled "mutation"?  It was only present for my Nidus and none of my other frames (tried Oberon, Titania, Valkyrie and Frost).

 

 

I tried clicking it and nothing happened.  Is this relating to the sentient weapons that were described in the last dev stream? I've tried a general search through google and have not found anything on this so I thought I'd ask here?

[(PSN)Exi-Eni-Eli]

I believe Nidus has some minor changes that change during mutation, like Equinox.

I suggest removing all attachments and messing around with it to find out.

[A68PL]

Nidus appearance changes when you toggle it. Look at him. You can switch between normal look and the look when he has +10 (or 15?) Mutation stacks.

Edited January 15, 2017 by A68PL

[Ninjadeath721]

it does this

[Btabc]

On ‎1‎/‎15‎/‎2017 at 2:16 PM, Ninjadeath721 said:

it does this

 

On ‎1‎/‎15‎/‎2017 at 1:39 PM, A68PL said:

Nidus appearance changes when you toggle it. Look at him. You can switch between normal look and the look when he has +10 (or 15?) Mutation stacks.

 

 

On ‎1‎/‎15‎/‎2017 at 1:38 PM, (PS4)PuriDiv said:

I believe Nidus has some minor changes that change during mutation, like Equinox.

I suggest removing all attachments and messing around with it to find out.

Thank you, everyone!  I'll have to try it again without attachments.  I wonder why it wouldn't work with attachments, perhaps a bug?