Tomb of the Mad Lord

{t}: Add {c} to your mana pool.
{2}{u}{u}, {t}: Discard three cards, then each other player may discard three cards. Each player who doesn't sends the top four cards of their library into their graveyard.
"The stories lining the walls should detail the reign of a mad king, but it's written in a language that makes as little sense as he did." - Feruos, Aurora of Science