Knight of Dark Revels

Menace
Siphon 2 (As this creature enters the battlefield, you may pay 2 life. If you do, this creature enters the battlefield with an additional two +1/+1 counters on it.)
It wasn't just the dark mages that learned to harness the power of life. It was those whose innate ability to take it were able to use the power to the fullest extent.