Hattori, Demon Bride

At the beginning of your upkeep, if you control a Demon, you lose 2 life.
Haste, Flanking, First Strike, Flash
{t}, Exert Hattori, Put a -1/-1 counter on a
Demon you control: Destroy target creature.
"A half-demon ninja who sold her soul to the devil?
Well that's one, frankly rather negative,
way of looking at it."