Alien Utopia

The  is a limited-time premium building that was released on August 31, 2021, as part of Act 4 of the Into the Simpsonsverse 2021 Event. Upon completion, Ethereal Beings are unlocked.

Regular
Ethereal Beings
 * Get Mistaken for Blarg Aliens - 8h
 * Run Out of Garbage to Eat - 24h

Limited Time
Anime Homer Ethereal Beings Evil Godmother Burns Noir Lisa
 * Harvest Gravitons From Alien Plants - 4h
 * Harvest Gravitons From Alien Plants - 4h
 * Harvest Gravitons From Alien Plants - 4h
 * Harvest Gravitons From Alien Plants - 4h

Trivia

 * Only one can be obtained.
 * It can be placed on grass, pavement, dirt, krustyland road, boardwalk, pier, edge of boardwalk, or edge of pier.