Rix Maadi, Dungeon Palace

Land
{T}: Add {1} to your mana pool.

{1}{B}{R}, {T}: Each player discards a card. Activate this ability only any time you could cast a sorcery.¹
Even miles away, if you put your ear to the sewer vents, you can hear the screams and the tempestuous laughter.
Illus. Martina Pilcerova

Gatherer Card Rulings [Nov 2009]

• 5/1/2006: When the second ability resolves, first the active player chooses a card to discard, then the nonactive player chooses, then all chosen cards are discarded at the same time. No one sees what the other players are discarding before deciding which cards to discard.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/9)	Dissension (Uncommon)