Talena, Hero of Ravnica

First strike, vigilance
When Talena, Hero of Ravnica enters the battlefield, create a legendary 0/2 white Human creature token named "Lucy, Ravnica's Purist" with "Shroud" and "This creature can't block."
As long as you control Lucy, prevent all noncombat damage that would be dealt to each creature you control. When Lucy leaves the battlefield, you lose the game.