Ulfang's Treachery

As an additional cost to cast this spell, pay 3 life.
Each player sacrifices a creature, then discards
a card.
Exile Ulfang's Treachery.
"Yet neither by wolf, nor by Balrog, nor by Dragon,
would Morgoth have achieved his end, but for the
treachery of Men. In this hour the plots of Ulfang were
revealed."