Morinfen the Empty-Soul

Flying, Trample
Cumulative upkeep—Pay 1 life. (At the beginning
of your upkeep, put an age counter on this permanent,
then sacrifice it unless you pay its upkeep cost for each
age counter on it.)
At the beginning of combat on your turn,
Morinfen gets +1/+1 until end of turn for the
amount of life you paid this turn.