Cube of Hours

{x}{x}, {t}: Put X cube counters on Cube of Hours.
{x}, {t}, Remove X cube counters from Cube of Hours: Draw X cards.
{7}, {t}: Search your library for a card named Hour of Revelation, Hour of Eternity, Hour of Glory, Hour of Devastation, or Hour of Promise, reveal it, put it into your hand, then shuffle your library.