This is how The Witch Doctor plans to use Flurry Heart for his evil purposes goes in The Crystalling Part 2.
[We see the Witch Doctor holding his staff as he stares into the orb which shows the picture of Flurry Heart]
Witch Doctor: Well, well, well. What do we have here? A fifth Alicorn princess? Hmm. She could be of use.
[He goes over to the Scorpio]
Witch Doctor: You know what to do.
[The Scorpio nod and run off]