Brainiac, World Collector

When Brainiac, World Collector enters the battlefield exile target land from each opponent.
When Brainiac, World Collector leaves the battlefield return all lands exiled with Brainiac, World Collector to the battlefield under their owners control.

City in a Bottle {t}: Add {c} for each land exiled
with Brainiac, World Collector.

"The universe's greatest secret will be revealed to me."