Arisen Shadowblade

Unblockable
When this creature deals damage to a player,
draw a card and discard a card. If you discard
an instant or sorcery, Exile it instead. You may
play it this turn without paying its mana cost.
Unearth {1}{p/b}{p/u}
Shadowblades leech magic off their victims. Truly a
mage's nightmare.