Presence of kozilek

When Presence of kozilek enters the battlefield draw two cards the discard a card.
Whenever a creature enters the battlefield under your control, you may have target creature become a copy of that creature with two +1/+1 counters on it until end of turn. If you do pay {x} where X is the difference in the two creatures converted mana cost.
"you can not comprehend a void as cryptic as reality itself."