Mana Purge

You may only have 1 Mana Purge in your library at any time.
As an additional cost to cast Mana Purge, your opponent may search your library, if he/she searches your library and there is another Mana purge, they may counter this card or copy it. If there isn't another copy of Mana Purge, they must shuffle their library and they must Exile top five cards or lose 5 life {t}You may play all land in hand, all land besides the first one of the turn and the second enter tapped