Nura, Trully Immortal

Culmilative upkeep — Exile a land. If you can't
lose the game.
At the beginning of your upkeep reveal the top
five cards of your library. You may play any
number of non-land permanents among them
without paying their cost and cast one non-
creature spell among them without paying the
cost. Add one mana of any color for each land
exiled this way. Put all the remaining non-land
cards into your hand.