Brigid Jorvik had one night to feed her serpent a god's meal, and nothing in her larder would do. The snake coiled on the packed-earth floor of her willow lodge, thicker than her thigh, its scales dulled to the color of wet ash. She had spent three years starving it on frog hearts and heron blood, whispering the old names into its mouth until it began to answer back. Tonight it would either swallow a divine spark and rise as the swamp's new god, or it would wake hungry inside a ritual circle with her as the nearest warm thing. She checked her offerings again on the floorboards. A jar of bog-water thick with tadpoles. A knot of her own hair. A heron's skull she had boiled clean last winter. She knew, looking at them, that none of it was enough. A fledgling god ate belief, not meat. She needed something a living creature had already worshipped. She pressed her palm to the serpent's flank and felt the slow tremor under the scales, the hunger already turning inward. If the ritual began without a true offering, it would finish with her bones. She pulled her cloak on and walked out into the reeds. A quarter mile from the lodge stood the little mud-brick shrine the shell-gatherers kept, its walls hung with crab shells painted in cheap dyes. The people who tended it were gone by dark, but their bird was not. A rose-pink flamingo stood inside the archway on one leg, still as a carved thing, its neck curved above the offering bowl. The shell-gatherers fed it scraps and called it lucky. They had prayed at that shrine every dawn for as long as Brigid had lived in the marsh. The bird had stood in the smoke of their prayers and eaten from their hands. It was soaked in worship the way a rag is soaked in oil. She caught the flamingo by the neck before it could unfold its wings. It did not fight her. She carried it back through the reeds while it watched her with one flat black eye, and she laid it inside the circle at the serpent's head. The snake lifted, tasted the air, and knew. Brigid cut the bird's throat with a clam-shell blade, and the blood ran hot over the scales. The serpent drank. She felt the change begin under her hand: the body swelling, the dull scales brightening to something that hurt to look at, a second pulse starting inside the first. It did not turn on her. It knew her now. But when it opened its eyes, they were not the eyes of her familiar anymore, and the shell-gatherers would come looking for their bird by morning.

The god that had been her serpent lay across the packed earth of the lodge, twice the length it had been at dusk. Its scales threw back the lamp light in colors she had no words for. Brigid stood at its head with the clam-shell blade still wet in her hand. The flamingo's body lay open at her feet. The snake watched her the way a stranger watches a stranger. She had made a god and lost a familiar in the same cut, and now she had to name the thing before the sun came up, or it would drift out into the reeds belonging to no one. She knew the rule. A god without a name answered to any mouth that found one first. If the shell-gatherers came at dawn and cried out over their empty shrine, they could shape a curse around the killer of their bird, and the serpent would wear it. She had to speak a name into its ear and have the swamp hear her speak it. Only then could she stand before any spirit or witness and say, this one is mine. She tried the old names first. She said the name her grandmother had used for the marsh-under-marsh. The snake did not move. She said the name carved into the boards of her lodge above the door. Nothing. She said her own name backward, which was a witch's trick, and the serpent only blinked once and looked past her at the wall. She went outside. The night was thinning at the edges. She climbed the stilted watch tower at the water's edge and stood on the narrow platform above the reeds. From up there she could see the shrine's low roof, and beyond it, a lantern moving through the grass toward it. A boy in a ragged pink cloak, alone, walking slow. Not a shell-gatherer. A stranger to the swamp, headed the wrong way for anyone with sense. She watched him stop at the shrine and lift one of the painted crab shells off its cord. He held it to his ear like a child listening for the sea. She climbed down and walked out to meet him. He did not startle when she stepped from the reeds. He said his name was Luca Omara, and he had come looking for a witch who was about to make a mistake. He said a god took its name from the first true thing said over it, and asked her what the first true thing was. She thought of the snake choosing her arm, and her choosing back. She said, We chose each other. Luca nodded once, as if he had heard the name inside the sentence. She went back into the lodge alone. She knelt at the serpent's head and spoke into the flat plate of its skull. She called it Chosen. The scales shivered under the sound. The swamp outside went quiet in a wide ring around the lodge, listening, and then it let the name settle. The god had a name now. It still was not hers.

Brigid stepped out of the lodge into a grey that was not yet dawn. The god she had named was still coiled inside on the packed earth, breathing slow. A name was not enough. A god took root only when someone besides its maker saw it and knew what it was. If no witness spoke, the swamp would forget by noon and the shell-gatherers' curse would find bare scales to land on. She had one soul near enough to serve. He was sitting on the shrine steps with a crab-shell charm still in his hand. She walked to him through the wet reeds. Luca Omara looked up. He did not stand. He said he had waited because he wanted to see what she did next. Brigid said she needed him to come inside the lodge and look at the thing on her floor. He asked why her. She said because there was no one else awake in the swamp, and because he already knew too much to send away clean. He weighed that. Then he set the shell down on the step and followed her. Inside, the serpent lifted its head. The lamp caught the scales and the color slid across them like oil on water. Luca stopped in the doorway. His hand went to the wall for balance. Brigid watched his face and not the god. She needed to see the moment the knowing landed in him, because that was the thing she was buying with her trust. He said, quietly, that is a god. He said it the way a man names a fever he has had before. The serpent turned its flat head toward him. The floor of the lodge went cold under Brigid's feet. Outside, the reeds stopped moving in a wide ring. The swamp had heard a second mouth speak the truth of the thing, and the truth had set. Luca did not look away from the serpent. He said she should know something. He said the shell-gatherers were already on the water. He had passed their poles in the dark on his way in. He had not told her before because he had not decided whose side he was on. Brigid asked if he had decided now. He said he had decided to tell her, which was not the same thing. She stood between the witness she did not trust and the god that did not know her, and she understood she had spent a secret she could not take back. The serpent's tongue tasted the air near Luca's boot, not hers. The god was rooted. The witness knew her crime. And somewhere out past the tower, poles were pushing through black water toward an empty shrine.