Kiawa

Invincible creatures that manifest in structures created by intelligent beings. They choose an object that was important to the previous owner of the structure they have manifested inside, and protect it as a "prize". They vanish when this object is claimed.

Their voices are feminine, and their touch is fatal.

Transformation into a Velinath
In a fractional number of cases, a Kiawa who has been destroyed will come back to life as a Velinath, and seek to reclaim their prize.