Phyrexian Nighthound

Unlifelink (Whenever this creature deals combat damage, you lose life equal to the damage dealt.)
When Phyrexian Nighthound enters the battlefield, put a +1/+1 counter on it for each 1 life you lost this turn.
{p/w}{p/b}, {t}: Put a +1/+1 counter on Phyrexian Nighthound for each 1 life you lost this turn.