Ghost Lock (World of Ghost Exile short story‪)‬

Caina Amalas is the Ghost circlemaster of Istarinmul, the leader of the Emperor's spies in the city.

When desperate refugees uncover a lost relic of deadly sorcery, Caina must keep the relic out of the hands of the cruel Umbarian Order.

Otherwise the Umbarians will use the relic to destroy the Empire...