Fourth Moon's Demise

You gain X life. Create X 1/1 white Human Soldier creature tokens. If X is 5 or more, destroy
all other creatures.

Prior to Honor's arrival in the system, Roshar also had a fourth moon, which died and fell. Its fragments are buried underneath the Shattered Plains, hide their surroundings from even the sight
of a Shard, and are made of something greater than aluminum.
based on White Sun's Twilight