Assassin Comandant

Deathtouch, double strike {t} If you control another assassin, destroy target creature
{b}{b}{b}{4}{t} Destroy target creature, put a token onto the battlefield that's a copy of it, is a black zombie in addition to it's other types it has "when this creature enters the battlefield, you gain life equal to it's power."
{b}{b} Sacrifice 4 zombie tokens you control, summon a planeswalker with "Master Assassin" in it's name.