Ornate Canopic Jar

It likely contains some visceral remains of Horestis. Use it to try destroying it. If you succeed, it will turn into The Remains of a Canopic Jar (Horestis) and you will see the Explosion Effect Explosion Effect. If you don't, you'll have to wait an hour for another chance and you will see the Death Effect Death Effect. It looks the same as a Lapis-Crested Vase.