Anck Su Namun

Replaces the card Gideon of the Trials.
+1: Until your next turn, prevent all damage target permanent would deal.
0: Until end of turn, Anck Su Namun becomes
a 4/4 Human Soldier creature with indestructible
that's still a planeswalker. Prevent all damage that
would be dealt to him this turn.
0: You get an emblem with "As long as you control
a Gideon planeswalker, you can't lose the game and
your opponents can't win the game."