Odin, the All Father

As an additional cost to cast Odin, the All Father,
exile all non-god cards from your graveyard.
Indestructible, Unblockable, Vigellence
Odin, the All Father cannot attack or block
unless your life total eqalls 5 or less.
At the beginning of your upkeep, you may return
a god card from your graveyard to your hand.
Whenever you do, you may switch life totals with target player.