The Shield of Gelu — Meg Hendry

Imunda has the Shield of Gelu, a shield made to be broken. If the shield is broken, the people of Mendus will be lost to their elements. Imunda doesn't know what they've found. The shield must be retrieved, but Imunda is far from the only enemy Dimitri and the others must face. Tempest is still after the Sword of Unda and will stop at nothing to get it. The Shield of Gelu is a novella.