Problematic Volcano

When Problematic Volcano enters the battlefield,
it deals 4 damage to any target. Then, starting
with you, each player assigns each creature they
control to the left or right of the volcano.
Whenever a creature enters the battlefield, its
controller assigns that creature in the same way.
Creatures can't block creatures on the other side
of the volcano.
When Problematic volcano is destroyed, destroy
all creatures on a random side of the volcano.