Darth Avacyn, Nether Matriarch

Rank IV - Master
Swift Strike, Flying
Spirit Strike {t}{b}{b}{b}{b} (Target a Being card on
the field with a lower attack value and destroy it.
Gain Vitality equal to its defense value, then flip this
card to Darth Avacyn, Lady of Defiance and have it
gain a Force ability listed on the destroyed card.)