Akirki Sot, Angel of Fates

Flying, lifelink, vigilance
Retribution- At the beginning of each player's upkeep, you may put X +1/+1 counters on this creature, where X is the number of creatures under your control that died last turn.
{w/b}{w/b}: {t}; sacrifice a creature you control.
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Do harm upon the undeserving and he shall bring his wrath upon you three-fold