Nirnaeth Arnoediad

(Battles can only be cast if each player controls four or
more creatures.)
Each opponent chooses a creature they control,
then sacrifices the rest. Nirnaeth Arnoediad deals
damage to them equal to the number of creatures
they sacrificed.
"In the plain of Anfauglith, on the fourth day of the battle, there began the Nirnaeth Arnoediad,
Unnumbered Tears, for no song can contain its grief."