Darth Maul, Sith Assassin

Double Strike, Menace
Whenever you lose life, put a +1/+1 counter on Darth Maul and he gains Haste until end of turn.
{3}{b}{b}{r}{r}: Return Darth Maul from your graveyard to the battlefield. You lose 4 life. Activate this only if your life total is less than half your starting life total.