ShadowGem

The ShadowGem is the base Gem Of Power that all others are based off of (Bar Custom Gem). It is the most basic of all of them, simply being a power source. The first ShadowGem made with the others to kill Heric, but he took this one for himself instead, only allowing him to be sealed away in Limbo.

Holder: Heric (Forcefully, The True Holder Is Unknown)