In fact, the night of the prerelease we actually pulled it from a booster pack, and sold it online that very night
You'll see this on a large scale, like the Wicked Slumber seizing the population, or with something as simple as some fae trickery
Where she really shines is in her ability, which says that whenever she attacks, her controller may put an Angel, Demon, or Dragon creature card from their hand directly onto the battlefield, tapped and attacking the same opponent Kaalia was attacking
You can look up the card and look to see if any trends are developing, like if any of the newer commanders are starting to use the card
This was a necessary change to prevent the card from just being completely black, but it makes this Pokemon appear much more distinct, perhaps contributing to its superior valuation