Tormented Nighthawk

Flying, painborn (Each 1 life you pay while casting this pays for {1}. It enters the battlefield with a -1/-1 counter on it for each 1 life paid this way,)
At the beginning of each combat, until end
of turn, Tormented Nighthawk gains your choice of lifelink or deathtouch for each
-1/-1 counter on it.