Life Force Mage

When Life Force Mage enters the battlefield, Hinder 2 (Choose a creature with the greatest toughness from among creatures you don't control, put 2 -1/-1 counter on it.)
{3}{u}{t}: Put a -1/-1 counter on target creature
you control, put a +1/+1 counter on Life Force Mage.
As long as it is alive, she can feed on it. It doesn't matter whether it is friend or foe.