Smeagol

Skulk (This creature can't be blocked by creatures
with greater power.)
At the beginning of your combat step, roll a
six-sided die. On a 4 or 5, tap Smeagol. On a 6,
target opponent gains control of Smeagol.
Whenever Smeagol attacks and isn't blocked,
you draw two cards and you lose 1 life.