Eternal Arbiter

Eternal Arbiter cannot be countered, targeted, exiled or removed from the game. If Eternal Arbiter is not in your opening hand search your library or side board for Eternal Arbiter and put it into play.

Any spell that fundamentally changes the mechanics of the game is countered and exiled.
such effects include but are not limited to cards that say: "you can't lose the game." "your opponent can't win the game." "players can't gain life." "If a player would gain life they lose life instead." "players c