Shining Blade War Horn

The Shining Blade War Horn is a possible reward from opening a Royal Gift.

Description
"Double-click to summon 3 Shining Blade allies of your level that last for 30 minutes or until slain in combat. The War Horn and summoning stones can only be activated once every 60 minutes per character, and only one group of allies summoned from these items can be present in an instance at a time. This item can only be used in explorable areas. "