Charon, Wandering Ferryman

You may cast Charon, Wandering Ferryman
from exile. Whenever Charon, Wandering
Ferryman enters the battlefield, reveal the top
card of your library and put that card into your
hand. You lose life equal to its converted mana
cost. At the beginning of your end step, if you
lost 4 or more life this turn, exile
Charon, Wandering Ferryman.
(Melds with Tainaron Hounds)