The Witchking of Angmar

Reveal the Witchking of Angmar only after Frodo and Samwise have been revealed.
The Black Host: When the Witchking is revealed, create 8 black 2/2 flying Wraiths.
By No Man: Gain 2 poison counters: Prevent all damage that would be dealt this turn.
If Sauron is defeated, you lose the game.
If Merry and Pippin and Aragorn and Borimir have been defeated, you win the game