These special containers are typically inlaid with runes of silver and stoppered by a brass plug bearing a seal engraved with sigils, glyphs, and special symbols. When the user speaks the command word, he can force any creature from another plane into the container, provided that creature fails a DC 19 Will save. The range of this effect is 60 feet. Only one creature at a time can be so contained. Loosing the stopper frees the captured creature. The command word can be given only once per day. Aura : Strong conjuration Caster Level : CL20th Prerequisites : Craft Wondrous Item, Trap the Soul