Easy opponent kill

Whenever a creature enters, that creature's controller may have target creature of their choice get -3/-3 until end of turn.

As this enchantment enters, choose a creature type. Creatures you control are the chosen type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

Sacrifice another creature: This creature gets +2/+2 until end of turn.

Whenever this creature or another Human creature you control dies, create a tapped 2/2 black Zombie creature token.