The Shard of Change.
A person who has a change in nature is given power.
Example: A person who was once honest begins to lie and turns into a deceitful, dishonest person. The person is granted power for the change.
You would have to define a lot of things. What is a persons "nature"? How long does a person need to fully change? + more.
Just thought it would be interesting and make for interesting characters with powers.
Also, maybe Shards of:
Deceit
Enjoyment
Independence/Loneliness/Solitude- Only loners, exiles and social misfits are empowered.