As you wish.
As the temple around them faded once more to that dark realm with the endless chequered floor, the doll, no longer 'just' a doll, but decidedly of a demonic form, appeared before them. This incarnation was much larger than the original doll, and was far more muscular. Additionally, however terrifying its features had been beforehand, they paled in comparison to the freakish, horrifying hideousness that this beast now beheld. Its teeth were jagged and bloody as ever, though its mouth was now very much real. Its eyes beheld a kind of organised madness, and clearly craved destruction and the assimilation of its targets' souls. There could be no doubting that it was now a definite threat.
Feel free to start a small sewage plant in your undergarments, it said, its voice deeper still than before, and with an air of angry madness to it. It's only a natural reaction, and your fear only reveals your soul to me more. Rest assured, your spirits will be mine to consume. And I will consume...consume...consume everything!
With a roar, it unleashed a powerful beam of energy by which it meant to attack.