Form of the Guardian

Hexproof.
When Form of the Guardian enters the battlefield your life total becomes 40.
You draw two additional cards and may play two additional land cards each turn.
Sacrifice Form of the Guardian: you can't lose the game and your opponent can't win the game this turn, then your life total becomes 20, prevent all damage that would be dealt to you or permanents you control this turn.
{4}: Draw a card.