(I know it's been a while, but this thread is great and I couldn't let it drop)
But even as Puganaut revels in the destruction of all who would take the cookie, the cookie begins to... move? Upon closer inspection, you realise that one of the screamers, caught in the pure chaos of the Warpstorm, accidentally morphed into the Divine form of The Cookie. You can even see what you thought were possibly chocolate chips developing into a myriad of angry eyes. The theory is, a rebellious Screamer coveted The Cookie, and craved its wondrous powers. As all was rent apart by Puganaut, and JvK was caught off-guard, the Screamer sees its chance. Leaping upon The Cookie like a cat upon a mouse, the screamer prepares to devour it whole. Yet it underestimates the sheer power of The Cookie; the sentience within that sacred food was determined not to be consumed, and so created a decoy of itself in the Screamer. In one final attempt to save the cookie, JvK grabs at what he thinks is the cookie as Puganaut sunders him against his iron paw, whilst The Cookie flees into the Immaterium. Thus, The Cookie itself is now tumbling through the realm of chaos itself. Down it plunges, further and further. With horror, you imagine The Cookie Itself falling into the great cauldron of Nurgle, tainted forever by the foul contagion within. Even as It seems doomed, Sunkerncity, in the form of a mighty Sunkern, valiantly leaps across the cauldron, beautifully intercepting The Cookie and fleeing the garden of Nurgle before the plague god could react. Now deep within the Realm of Chaos and with the cookie in his grasp, Sunkerncity wonders how anyone could find him here.
After all, it's his cookie now...