This is a kinda short story set in Legacy of Prometheus Universe. Written for Patrick's Potluck Jam.
Covers the aftermath of Treasure Island after the last known character is gone forever.

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The departure of Arkouda from Treasure Island has left a brief silence. Now that mushroom Kinoko is alone again, without anything to confide with...
And after years, this place has undergone transformations.
Regardless of the chaos and commotion outside, there has been signs of renewed life on this small island - which wasn't the case in the past.
Various species grow and thrive on otherwise inaccessible corners. Rifts and unknown events brought extraterrestial creatures, whatever benign or hostile.
Then comes another phenomenon - the appearance of new land rising from the sea floors, surrounding the island.
What makes this event shock everyone is that these lands seemed to have a will of its own, and that it could generate festivals out of nowhere - all with the presence of a new traveler.
One of the explorers in green clothes recalled it having lots of unknown customs - what "Autumn Festival", "Halloween"... whatever there is.
Yes, you're right, he's the reincarnation of St. Patrick, who could make the land he walks grow clovers by itself.
Over time, it fully serves as a sanctuary for people who lost their homes from afar, offering them peace in mind during the troubled times. Even when the galactic war is over and the Meteor Flies become history, many across the galaxy take strolls to this place and bring with them knowledge and culture, making Prometheus a planet of cultural diversity.