Tower Yprazi stands at the dead center of the Hills of the Damned, a crooked spire of blackened stone on the one rise where the soil is most wrong. It is older than Awobiso, older than the Marrovini claim to these waters, older than the failed binding that gave the hills their name. The Marrovini do not garrison it. They surround it: a ring of guard posts trained inward, watching a single sealed door that has not opened in living memory.
What the tower holds
The popular account is that a Marrovini patrón, generations back, tried to bind a powerful spirit to the hills as a guardian, the way Yibiye binds its Gates, and that the working failed. The account is half true. The spirit was already there, already sealed inside Yprazi long before any human reached the archipelago, and the patrón did not summon it so much as reach for a chain that was already drawn. His working cracked the older seal instead of laying a new one over it. What leaks from the hills now leaks because of him.
Yprazi is not the tower and was never a man. It is a name, and the thing that answers to it endures the only way a spirit can: by being remembered. Forgotten, it ends. So it makes itself impossible to forget. The voices that carry across the water on still nights are bargains, and a bargain freely taken folds the taker into the thing's story, one more living mind through which its name survives. This is why the Marrovini will not speak that name, will not chart the hills, will not let a traveler so much as admit the place exists. The cordon is not there to defend the tower. It is a quarantine, and what it enforces is forgetting.
The door
The single door has held since the patrón's working, and the Marrovini have decided, correctly, that opening it would finish what he began. They do not study it. No scholar is sent in to read the carvings on its lintel, because reading is a kind of remembering and remembering is the one thing that feeds what waits inside. The family's standing order here is the strictest they keep and the least explained: the door stays shut, the name stays unspoken, and anyone who argues otherwise is watched for the rest of their life.