Reactor Meltdown

Flash
Enchant player
When this enters the battlefield, put a growth
counter on all tapped lands enchanted player
controls. They don't untap during their
controller's next untap step. On enchanted
player's end step, put a charge counter on
Reactor Meltdown. If there are three or more
charge counters on Reactor Meltdown, exile
Reactor Meltdown and destroy all lands
enchanted player controls with growth counters.