Underworld's Wrath

Each player sacrifices a creature and discards two
cards. Any player that discarded cards with a
combined mana cost of 10 or greater draws three
cards and gains 4 life. Any player that discarded
cards with a combined mana cost of less than 10
must sacrifice another creature and loses 4 life.
Whenever a creature dies this turn, its controller
loses 2 life and must discard a card