Balithon, the Cursed

As you cast Balithon, the Cursed sacrifice another Zombie you control.
{b}{b}: Search your library for a Zombie card and put it onto the battlefield under your control.
{r}{r}: Balithon deals X damage to target player, where X is the number of Zombies you control.
At the beginning of your turn, return a Zombie from your graveyard to the battlefield under your control.