The Argonnessen Prophecies
It's a rock. That unlocks something...
The Shardkey may be treated as a +1 magical implement, and can be used by any class that can cast implement powers. It currently has no critical bonus or properties otherwise.
Recovered from a tomb created by Malleon the Reaver as part of an agreement with the dragons of Argonessen, this dragonshard is approximately the size of a human head. Yellow veins of light seem to shift slowly through the clear crystal, and it is quite pleasant to look at.