Samara, Mystic Artificer

{u}, {t}: Reveal cards from the top of your library
until you reveal an artifact card and exile it. Add
an amount of {c} equal to the exiled artifact's converted casting cost. Put the other cards into
your graveyard and put a -0/-1 counter on
Samara, Mystic Artificer.
Her ability to warp and shape pieces of the Blind Eternities to her will is a powerful skill, but one that
always comes with a cost.