Kavash, the Whispered

Flash, deathtouch, first strike.
At the beginning of each end step, return Kavash
to its owner's hand. Then, if a creature died this
turn, create a Gold artifact token with, "Sacrifice
this artifact: Add one mana of any color."
Throughout the streets, her name is only dared spoken
in hushed whispers. In tyrants throne rooms, eyes are
always shifting towards shadowy corners.