The Dark Petition gives her immense power and long-lasting youth at the expense of being indebted to the four demons
The generous warp cost pushes the card from casual playable into Vintage Cube staple territory
Nadier, Agent of the Duskenel Nadier, Agent of the Duskenel creates an interesting loop where tokens you make and sacrifice or kill in combat buff it, and when this black commander leaves, you get to make a lot of tokens
Cone of Flame first came out in Weatherlight and was just designed as a cool direct-damage variant, one where you damaged three different things each with a different amount of damage
If you're curious how to build a deck, then read on
If you either gain life or an opponent loses life while these two cards are on the field, it starts an infinite cycle of you gaining life and you forcing an opponent to lose life