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The Portal to Rigel 7 is a limited-time premium building first released during the Treehouse of Horror XXV Event where 8 hours spawned 6 Rigellians. After the event, it earns at a premium rate.

It was re-released for the Treehouse of Horror XXVI Event, the Deep Space Homer 2016 Event and The Invasion Before Christmas 2017 Event, though for a smaller price than before.

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