As Hall of Famer Reid Duke perfectly put it, the card made blocking the fundamental defensive action in MTGs rules a fools errand
If you cast one Zombie creature card 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 card from your graveyard that turn
If the mana base were stronger, this deck would probably be between an 8.5 and a 9
If you gain an amount of life "for each" of something or "equal to the number" of something, that life is gained as one event and Aerith Gainsborough's second ability triggers only once
If youre reading this post, you probably have a Pokemon lover in your life
There are ways to play around this, but Emerald/Sapphire is usually the epitome of ramp decks, meaning it could backfire as a strategy