Theater Square

Unique (a player may not control two or more Unique permanents with the same name). You may reveal this card from your hand and exile it face up. If you do, draw a card. You can’t play or put Theater Square on the battlefield if you don’t control a City Center. If City Center leaves the battlefield, sacrifice this land. {T}: Add {R}. {R}{R}{T}: the next instant or sorcery you cast this turn has:“when you cast this spell, exile cards from the top of your library until you exile an instant or sorcery whose mana value is less than this spell’s mana value. You may cast that card without paying its mana cost if the resulting spell’s mana value is less than this spell’s mana value. Put the exiled cards on the bottom in a random order“.