Gisa and Geralf

You must pay the costs to cast that Zombie spell. If it has an alternative cost, you may cast it for that cost instead.

Once you begin to cast the Zombie spell, losing control of Gisa and Geralf won’t affect the spell.

If you cast one Zombie creature spell from your graveyard and then have a new Gisa and Geralf come under your control in the same turn, you may cast another Zombie creature spell from your graveyard that turn.