Keep an ablative shield of dolls in front of you while you retreat. That will work, certainly. There's nothing wrong with that plan.
You slowly walk back, keeping your eyes to the top of the stairs until you reach the point where the stairs turn around. It's at that moment that the blurry white thing jumps into the light again. Its way of moving is disturbing, it doesn't move like a normal human, it alternates between pausing for a few seconds and then suddenly 'changing' into another stance. In this case into a white blur facing you and then jumping straight at you.
You order your dolls to get between you and it as quickly as they can while you retreat further down the stairs. It smashes into one, making the doll land on its back and then grabs the other by its neck and lifts it off the air.
It flickers like an image on an old TV, one moment facing the doll, the next facing you. It's hard to make out, but you somehow know that this is the doll you left in the room with the display cases. It's not unscathed from its attack on your doll, one of its arms having been broken and hanging limply on its side. For a moment you find it strange that you can't feel it. The next you immediately regret those thoughts, as you sense it reconnecting to your hive mind, but as something more than mere sights and sounds. It flickers and turns its attention back to the struggling doll in its grip. You feel its cold alien presence spreading through your network, reaching towards you like whispers in the back of your mind. The doll in its grip stops struggling, no longer responding to your commands. It serves a new master now.
Looks like this is one problem you can't beat merely by throwing dolls at it and hoping they eventually bury it.
It's at the middle of the stairs with your two dolls. You're at the bottom with your other doll. What do you do?
(I chose the 'Insane in the membrane' vote for Alan first! Need I explain? Also, @ ATHATH: Unless Secundus is comfortable with moving more than a handful of dolls via a hive mind, usually simultaneously, he would find the experience disconcerting. Not that the haughty Napoleon would object to having a second baser around...)
Never in his entire life had Napoleon felt so hopeless. He was so confident that his superior intellect would win the day, that no one was a match for him. Now he was confronted with a terrifying enemy that he cannot hope to defeat, at least as easily as he'd hoped, and the cruel irony of it involved one of his dolls not only changing into such a being but stealing control of one of the other dolls. Whatever horrible being that can use his own power against him must have a twisted sense of poetic justice. No doubt that it seeks to punish him for taking the sword by twisting his doll into an abomination and could still be within this museum. However, the former doll's broken arm and the sword he still held reminded Napoleon that the fight wasn't over yet and he composed himself slightly.
"Ah... look h-h-how much you g-g-grown..." Napoleon muttered, his voice faltering. Clearing his throat, he continued as steadily as he can.
"As God as my witness, I truly didn't expect this... turn of events. I expected myself to enjoy a peaceful evening with a bottle of Pinot Noir and steak, not being chased throughout a haunted museum or whatnot by my own twisted creation."As Napoleon stealthily took steps backward toward the door he thought of the twisted doll's alien presence in his hive mind. He can still hear the whispers in his psyche. However, this presents a possibility: if it can reconnect itself into his hive mind, perhaps he can reestablish control? It was a slim possibility but a possibility nevertheless. So many variables are arranged around him and Napoleon have not deemed them to be wasted.
"Of course, as I would say," Napoleon continued with a flesh-eating smile.
"Even when chipped, a sword can still kill."Before the twisted doll could figure out what he's up to, Napoleon will control the doll lying on its back to get up and cut it to pieces, starting with its legs. While it's distracted, Napoleon will use all of his willpower to reassume direct control over the twisted doll long enough to banish it. If all else fails, Napoleon and the doll at his side will open the door behind them and enter the room. They will quickly close the door and attempt to barricade it. Throughout the execution of his plan, Napoleon will defend himself with his sword and the candle he is still holding if necessary, using the doll as a last resort.