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
New and factory sealed
Witherbloom Command Witherbloom Command has an effect that is the same as Grapple with the Past and the cards listed above, but with far more choices and upside
A reverse holo trainer card that sees heavy play might hold value better than a holo creature nobody uses
To me the viable picks are Liliana, Sneak Attack, Polluted Delta, Jackal Pup and Bloodbraid Elf
If you're new to Pioneer on a tight budget and looking to play in Pro Tour qualifiers, the Boros Heroic deck and Mono-Blue Spirits are the two most likely choices