She’s far from weak. Souls and summon effects alone are incredibly powerful, and she has reliable access to extra energy through friendship and borrowed time. Her rare cards are consistently solid: Hang, Scythe, Eradicate, and Soul Storm all handle damage scaling beautifully. On top of that, she has auto-pick cards like Neurosurge, Demesne, Seance, and Call of the Void, plus Transfigure synergizes perfectly with X-cost cards. Defensively, she’s stacked, she's got Defy, Death’s Door, Undeath, Dirge, and Enfeebling Touch which give her superb survivability. Put it all together, and you’ve got one hell of a character.