Elemental Focus Pendant - Handout (Patreon)

Behold! She exclaimed. The elemental focus pendant. Within it is the crystallized essence of an elemental creature. This acts as capture and holding device, magical focus and deployer of said creature. 

The crystal inside is generated by the device and can be swapped out to send out a different creature as well. And worry not, those it captures are taken out of time and existence whilst inside The crystal. 

But enough talk, let me show you how it works. As she presses down firmly on the device's top. 

*GM note - i think you can see a story on these crystals. You could make it basic wholesome or super horror disturbing. Hell even make it, so the seller is lying about creating the devices originally and have the party stumble across more of these crystals on their travels which lead them to a long forgotten civilization or something.