Rise of Pestilence

At the beginning of each upkeep you may Exile
the top card of your library reveal it and exile it
under Rise of Pestilence.
{u}{u}{t}: Rise of Pestilence gains hexproof till
your next turn
{u}{u}{x}{t}: Sacrifice Rise of Pestilence put X
cards exiled with Rise of Pestilence on to the battlefield, put the rest into your graveyard.
Pestilence comes faster than you think.