Ruins of the Fallen Throne

{t}: Add one mana of any color to your mana pool.
Entomb X {x}{u}{b}{r} ({x}{u}{b}{r}: Look at the top X cards of your library. You may choose a creature card from among them and put it into your graveyard. Put the rest on the bottom of your library in any order.)
{2}{u}{b}{r},{t}: Put all creature cards in your graveyard onto the battlefield tapped.