Anakin! Juju on that Bubble!

Cumulative Upkeep {1}
When Anakin! Juju on that Bubble! enters
the battlefield, you gain 1,000 life.
When Anakin! Juju on that Bubble! leaves
the battlefield, you lose (10-X)(100) life,
where X is the number of age counters on Anakin! Juju on that Bubble!