This is the first time I've written a drabble about Cas. I was imagining how it felt for him to absorb all those souls...
Purgatory Parfait
Cas swallows Eve's children whole, drinks them down like a supernova soda, their million eyes the cherry on top. Their sweet syrup stings him, their candy words press on his flesh, and he's hungry and aching and begging for more. Cas remembers Famine, remembers Jimmy inside crying for red meat, remembers the ache he felt for weeks afterward, but he's never known hunger before, not like this. He's a hundred halls of empty, he's seven screams away from insanity, and sun spots flare from every pore of his skin.
Souls burn sweet like sugar, souls burn sweet like purgatory parfait. They burn away his tears, his need for love, his need for anything but power. Cas is an endless net cast over an ever-widening sea, but his heart is hidden, even from himself.