Xerxes' Dark Ritual

Whenever a creature you control attacks, the target player loses 1 life.
{1}{b}: Target creature gains First Strike or Deathtouch until the end of the turn.
{2}{b}: Draw a card, then discard a card.
When this card leaves the battlefield, search
your deck for a card named Xerxes, Dark
Knight, put him on top of your deck.