Also, sacrificing a Mountain is not hard since you might have already used your red card before and you can play mono black easily in madness decks
It's likely to see play in Limited as a utility card, but probably won't make waves beyond that
You might be able to reap the reward of something that requires you to discard a card while still getting to cast the card you discarded
Some collectors informally describe the earliest Trick or Trade lineup as a Nullifying Zero Set, meaning the foundational wave of Halloween promo cards that established the series before later yearly variations expanded the theme
The designers are then given a deadline and the development team selects from the submitted cards to fill the holes
It's reactive and proactive, it kills and sets up draws, and it works beautifully in a Zombie deck, although it doesn't require it