Shadow Wolf

Shadow, Unblockable. Shadow Wolf costs
{1} less to play for every Wolf you control.
{t}: Put a Tag Counter on target creature.
{t}: Replace Tag Counter with Curse Counter.
{u}{b}{t}: Gain control over target Cursed Creature
for as long as it's Cursed.
"You don't need to see us for us to haunt you.
You will feel us from the inside-out."