The Final Living Shard of Nova's Heart

The final living shard of Nova's Heart is a jagged crystal no larger than a clenched fist, held within a nest of blackened silver. Lightning crawls through its translucent depths, illuminating a tiny galaxy that beats in time with the heart of the creature holding it. The shard is warm when offered mercy, cold when sacrifice is demanded, and painfully bright whenever a major choice approaches. It can be worn as a pendant, mounted in a staff, or held in one hand, but it always turns toward the sky during a storm.