Cause for Retribution

Whenever a nontoken creature or planeswalker you control dies, put a Hatred counter on Cause
for Retribution.
At the beginning of combat on your turn, creatures you control get +X/+0 until end of
turn, where X is the number of Hatred counters on Cause for Retribution. Then Vampires and Sorin planeswalkers you control gain lifelink until end of turn.