A 5/4 with first strike for five is already a good deal, but her follow-up ability is even better
This Character gains +1000 power during this battle for every card trashed
Its colorless, and it gives you a spell from the discover ability the turn you cast it, so its fast enough
If your word is true and you show fierce dedication to one of the courts, the entire realm will be your oyster
Declaration in Stone, Stasis Snare, and Reflector Mage are off the table, mostly limiting options to Ob Nixilis Reignited, Planar Outburst, Tragic Arrogance, and back-door Collected Companies as common ways to remove this threat as of the current Standard format
In particular, Innistrad introduced double-faced transforming cards to reflect its horror inspiration