I'm looking for some advice and opinions, thanks. Say a Shadowdancer (SD) player has a shadow companion. Say the SD arranges for a friend to cast a baleful polymorph on him to become a diminutive bat, permanently (and makes his Will save so he keeps his mind).
Can the bat SD use his companion for total concealment by staying INSIDE it? Completely within the shadow, with no part exposed? Assuming he can make the right Fly skill check to hover. Bats in the real world can have wingspans as short as ten inches, if that matters. Note that in bat form the SD has 20 ft of blindsense and his companion can tell him via their completely private language what there is to see.
Say the bat SD has the Flyby Attack feat. He wants to fly out, attack a target, and then fly back into the total concealment of his buddy.
Is this legal? Does his target lose his dex bonus to attacks? Does the SD gain all the advantages of total concealment?
Total Concealment: If you have line of effect to a target but not line of sight, he is considered to have total concealment from you. You can't attack an opponent that has total concealment, though you can attack into a square that you think he occupies. A successful attack into a square occupied by an enemy with total concealment has a 50% miss chance (instead of the normal 20% miss chance for an opponent with concealment). You can't execute an attack of opportunity against an opponent with total concealment, even if you know what square or squares the opponent occupies.
If someone does attack into the square, is the attack resolved against the shadow companion or the SD?
[Note that this question does not include any reference to Hide In Plain Sight at all! Ha!]