Total Concealment - what happens if you attack from it?

[Attrition]

Hi - was looking at the term "Concealment", and have a character that can be in "Total Concealment" all the time - what then happens when I attack from that? If I was a rogue, would I get sneak damage?

[Abyssian]

Yes. Some more details couldn't hurt, though. How are you maintaining constant total concealment? How are you able to see through whatever effect is providing that concealment?

[Attrition]

Well, I'm looking at a (Mainly) Ranged Rogue character that takes two levels of Synthesist. That would allow the following two evolutions:

Shadow Blend (Su)*

In any condition of illumination other than bright light, the eidolon disappears into the shadows, giving it concealment (20% miss chance). If it has the shadow form evolution, it instead gains total concealment (50% miss chance). The eidolon can suspend or resume this ability as a free action. Source: Advanced Race Guide

Shadow Form (Su)*

The eidolon's body becomes shadowy and more indistinct. This shadow form grants the eidolon constant concealment (20% miss chance), and its melee attacks affect incorporeal creatures as if it had the ghost touch weapon property. The eidolon's melee attacks deal only half damage to corporeal creatures. Source: Advanced Race Guide

It's just an idea fermenting in my head, but as I looked around, I could find what happens when you attack someone with concealment, just not what happens when you have (total) concealment and are the attacker.