Presence Of Emrakul

When Presence Of Emrakul enters the battlefield, you may have up to three target opponents reveal their hands. If you do, you may have them discard a card of your choice with converted mana cost 3 or greater.
DeliriumIf you have four or more card types in your graveyard, spells you control cost {2} less to cast.
"You can not fight a enigma as vexing as life itself."