Charred Foyer
At the beginning of your upkeep, exile the top card of your library. You may play it this turn
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Warped Space
Once each turn, you may pay 0 rather than pay the mana cost for a spell you cast from exile.
Rarity:M
#:129
Card Type:Enchantment — Room
Flavor:(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it)
Casting Cost:
// 
(3)(R) // (4)(R)(R)
Artist:Andrew Mar