The Cabal never expected its creations to create servants of their own.

Gravespawn Sovereign

Tap five untapped Zombies you control: Put target creature card from a graveyard onto the battlefield under your control.

The warlocks never expected their creations to create servants of their own.

Starter Commander Decks

The List

Midnight Hunt Commander

Onslaught

Tap five untapped Zombies you control: Put target creature card from a graveyard into play under your control.

You may tap any untapped permanents you control with the appropriate creature type (including this creature) to pay the cost of the ability, including creatures that haven't been under your control continuously since the beginning of your most recent turn.