Nature's Disorder

Nature's Disorder enters the battlefield under the control of an opponent of your choice.
At the beginning of your upkeep, choose one that
hasn't been chosen --
+ Each opponent creates a 0/4 artifact creature
token for each creature you control.
+ Tap all creatures. Each opponent gains life
equal to the number of creatures tapped this way.
+ Tap target creature you control and a creature
of each opponent's choice they control. Those
creatures fight your creature.