The Black Diamond

After the events of Diamond Quests 100 & 101 and as a result of its role in fragmenting and re-forging the Opals, the Black Diamond was formed. This gem gets passed from Diamond to Diamond to hold while they maintain the rank. The Black Diamond can absorb and release energy gathered during a fight; duelers of Diamond rank may discover how to use this ability to make their attacks stronger and more powerful.
Additionally, the Black Diamond can absorb echoes of the Diamond's personality as it is passed from person to person. Over time, it seems as if the Black Diamond may use these echoes to form a sentience of its own. The Black Diamond may have other abilities yet to be uncovered as well.
This thread is to immortalize whatever you, as a Black Diamond holder, want to tell future holders about what happened/was absorbed by the gem during your character's reign.