Dimir's Gift

{x}{t}: Tap X permanents
{x}{x}{t}: Target player mills X cards
{x}{x}{x}{t}: Destroy X creatures
{x}{x}{x}{x}{t}: Target player loses X life
{x}{x}{x}{x}{x}{t}: Reveal cards from the top of your library until you reveal X creature cards, put them into play, then the rest of the cards, shuffle them into your library