Godwyn, Prince of Death

You may look at the top card of your library any time.
You may play the top card of your library. If you cast a spell this way, pay life equal to its converted mana cost rather than pay its mana cost.
{t}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

"On a night of wint'ry fog, the rune of Death was stolen. And the demigods begal to fall, starting with Godwyn the Golden."