Vestal

Lifelink.
Unholy Slayer 1 — Gets +1/+0 when blocking
or blocked by black creatures.
Veterancy — At the end of combat, if this creature survived combat and caused you to gain life points
for the first or third time, it gains +1/+0 and +0/+1 respectively.
and +0/+1 respectively.
{1}{w}: Target creature gets -1/-1 until end of turn.
"A sister of battle - pious and unrelenting!"