Kvettie, the controller

Flash
Kvettie, the controller's power and toughness are
equal to the basic lands in play.
When Kvettie, the controller enters the battlefield destroy all non-basic lands, and all creatures.
If you were to cast Kvettie, the controller on an opponent's turns each opponent may only play
one spell until your next end step.
Kvettie, the controller has weakness to artifacts.