Arrax, Selfless Guard

You may reveal Arrax, Selfless Guard from your opening hand. If you do, you may begin the
game with a 0/1 green Bird creature token on the battlefield. It has "{t}: Add one mana of any color to your mana pool."
Sacrifice Arrax, Selfless Guard: Prevent all damage that would be dealt this turn by sources you don't control.
"To protect majestic species, that is my duty."