The best part of the spell is that you can cast it at instant speed, letting you drop Sphinxs Revelation at the end of your opponents turn or in response to an attack, letting you draw a bunch of cards or keep your life total up above the danger zone
It destroys all land, which makes it a very powerful card in the right deck
Simultaneously, her +1 ability gives a second life to your enchanted Permanents, allowing you to use your attackers as blockers and stockpile additional Mana from your enchanted Lands
It requires 2 Energy to be used, and at the grassroots level, your 2 Energy will get you 100 DMG, provided both are heads
on the day of the sale
Its rare that Red decks get draw like this, especially when its also mana advantage, and doesnt use the exile zone like impulsive draw