Piercing Insight

At the beginning of your upkeep, look at the top two cards of your library. Exile one and put the rest on top of your library in any order.
{x}: Put X cards exiled by Piercing Insight on top of your library in any order. If you do, target creature gets -X/-0 until end of turn.
At the beginning of your end step, if you control one or more creatures, you may cast Piercing Insight from your graveyard.