Satan, Grand Demon Dragon

Pierce (An attacking creature with Pierce can deal
excess damage to the defending player even if it is
blocked.)
Evoke (Each card you discard pays for {1}.)
Pact (You may pay 2 life points for each {1} in
this card cost)
You can't play this card from your hand.
Whenever this card is put in a graveyard form anywere, each player discards a card.