mtg demon support cards of Loathing - Theros Beyond Death you may cast an enchantment spell by paying life equal to its mana value rather than paying its mana cost. A Deal With The Devil

From Man-o'-War to this, we've come a long way

Namely, the loss of his godlike planeswalker powers and his extensive planes-spanning machinations to regain his former stature

Soulherder, Teleportation Circle, and Thassa, Deep-Dwelling are all cheaper and better, but not every deck can run them or wait until the end step

In fact, I've played all but 5 cards in the Blue and White genre

Ydwen Efreet is not officially Reserved, but its the only non-RL Arabian Nights rare to never see a second printing during the subsequent 30 years

It's mostly used in the same way that people use Burning Wish and Cunning Wish in Legacy: it can find a potentially game-winning combo piece but also a ton of unique answers like Fracturing Gust, Firespout, Slaughter Games, Flesh / Blood and Wear / Tear