Hal and Alena, Kessig Hunters

You can't cast this spell unless a Human you control died this turn.
Hal and Alena enters the battlefield with a +1/+1 counter on it for each non-Human creature your opponents control.
{1}{g}{w}, {t}, Remove a +1/+1 counter from Hal
and Alena: Exile target artifact, enchantment, or
non-Human creature.