But she couldn’t tell if they understood what those keys unlocked.

With a smile for Sister Petra, who had just set down a newly trimmed quill and now wiped ink from her fingers in preparation for services, Antonia left the library and dutifully returned to the guest hall. She tided herself up, revived herself with some wine set aside for this purpose, and went to pray at the small chamber where an altar stood. There was a cunning screen set into the altar itself, a concealed alcove so that an observer on the other side could look into the tiny chapel without being seen. She had noticed it within days of her arrival and could now tell if someone was lurking behind it, spying on her. There was no one there now; they would all be at prayer.

She spent a while making sure everything was ready. Then she knelt before the altar to pray, and to wait.

God would grant her triumph. Who else would see that God’s work was done properly on Earth, if not her? She asked, of course, for forgiveness. Sometimes the blood of innocents had to be spilled in order to bring about the greater good for humankind.

In due course, as she always did, Sister Lucida arrived to escort Antonia to dinner. A halting footfall followed by a scraping sound as she dragged her cane along the ground preceded her appearance in the archway that separated the tiny chapel from the main guest hall. As the lackwit sucked in a breath, she snorted and gurgled, breathing hard, eyes blinking away tears. The light in the guest hall always made Sister Lucida cry, as though she had caught sight of angels in the streaming rays. She looked around aimlessly for a bit, head bobbing; it was difficult for her to focus.

At last, she fixed on Antonia and hobbled over. She grinned, displaying about ten teeth, all she had left. Her voice was a cross between a goose’s honk and a pig’s snort. “S supper! Praise God!”

“Pray kneel beside me a moment while I finish my prayers,” said Antonia with a gentle smile. She even helped Sister Lucida with the difficult task of kneeling, grasping her firmly around the back to hold her tight.

Then she slipped a slender knife out from the girdle wrapping her waist and thrust it, decisively, swiftly, up between Lucida’s ribs, into the heart. As she held it steady, it pulsed to the frantic beat of the nun’s heart. Lucida’s mismatched eyes widened in shock and fear. She opened her mouth, but no sound came out, only a strangled croak.

“Pray, keep still, Sister Lucida, or you will surely die at this moment. As long as my hand holds the knife firm, then you will stay alive.”

A whimper escaped the nun’s lips, nothing more. A single tear slid from her right eye, trickling down her poxmarked face.

Antonia closed her eyes, the better to concentrate. The familiar syllables poured as smoothly as cream from her lips. She did not understand them, of course, because they came from the ancient rituals known to the Babaharshan priests, but their efficacy was undoubted. “Ahala shin ah rish amurru galla ashir ah luhish. Let this blood draw forth the creature out of the other world. Come out, creature, for I bind you with unbreakable fetters. This blood which you must taste that I have spilled makes you mine to command. I adjure you, in the name of the holy angels whose hearts dwell in righteousness, come out, and do as I bid you.”

The iron-forge scent stung her nostrils. The breath of its being, shuddering into her view, stirred her hair. A galla swayed at the edge of her vision, a dark, towering shape, like a tall reed, reaching from floor to ceiling of the stone chamber.

Lucida, seeing it, jerked convulsively in terror. The knife in her chest wrenched sideways. Her heart’s blood poured out of her, a river of scarlet gushing onto her robes, flowing away onto the stone floor. With a grimace of distaste for the mess, Antonia released her and let her drop. She stood and took a step back as the shadow that was the galla brushed past her, smelling the rich tang of innocent blood. Where its substance flicked over her, she heard faintly its agonized screaming, like the whine of a raging storm heard through thick walls. The middle world was torment to the galla; that was why they were so easy to control once they were brought over. Though it wavered, tiny tendrils lapping out to touch the flowering lake of blood, it could not resist the very thing that would bind it to her will.

It drank.

She had to cover her nose with a perfumed sleeve to muffle the stink of blood and the stinging forge-tang of the creature.

Soon enough, it had finished. Lucida was, amazingly, still alive, still conscious, her eyes wide and staring and one hand twitching. Life ebbed quickly. A last whimper escaped her as her soul fled. Antonia was relieved that the lackwit nun had died quietly. Not everyone did.

Still, it was an effort to raise her hands to pronounce the final command. “I adjure you, creature. This is your task, and you will do as I command. Kill the woman whose true name is Lavrentia, the mother of Anne.”