It's likely to see play in Limited as a utility card, but probably won't make waves beyond that
If you roll chaos you get a 1/1 deathtouching, hasty assassin
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
Consultation combos have the potential to win you the game before anyone else gets a chance to even take a turn, and that's pretty egregious
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 reactive and proactive, it kills and sets up draws, and it works beautifully in a Zombie deck, although it doesn't require it