Platinum Emperion and Tree of Redemption
The Tree of Redemption will not be changed.


  701.8. Exchange
  701.8a A spell or ability may instruct players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if the entire exchange can’t be completed, no part of the exchange occurs.


Also see this ruling on Platinum Emperion:


  If an effect would cause you to exchange life totals with another player, the exchange won't happen. Neither player's life total changes.