Mina Harker, Dracula's Lover

(Starts the game outside of your library)
Hexproof, Lifelink
{x}{u}{b}{t}: You may cast target spell with converted
mana cost X or less from exile until the end of the
turn without paying it's converted mana cost.
{3}{u/b}: Target player exiles cards from the top
of his or her library until he/she exiles a creature.
Put all cards revealed this way into exile, then
gain 1 blood counter. Activate this ability once per
turn whenever you could cast a a sorcery.