Isekai Island

The world of Scarterra does have not have teleportation magic in it, but it is said that if someone on Scarterra utters a secret code phrase, than they can be teleported to a magical paradise realm known as Isekai Island.
Supposedly, the secret code phrase is known only to a being known as "The Author".

Geography

Some believe Isekai Island is a magically shrouded island, some believe it's a miniature alternate plane of reality only loosely connected to Scarterra separated by a mystical force known only as "the Fourth Wall".

Ecosystem

It's said to be warm beaches and palm trees though it turns to snow and evergreens around something called "Christmas" time and it turns into an autumnal paradise around something called "Oktoberfest".

Localized Phenomena

It is believed that those on the island, or perhaps only "The Author" can change Scarterra's fundamental aspects of reality while standing in it, including adjusting the realism, aesthetics, and grittiness of the setting.
Teleportation to any time and place in Scarterra is said to be possible here. It also is said to have Mary Sue and Marty Stu transformation powers for those on the island, whatever that means.

Climate

It is believed that the climate of Isekai Island is constantly adjusting to the whims of "The Author" becoming a lot cooler when "The Author" wants to take a nap.

History

Isekai Island is believed to have existed only the head of "The Author" for years but held back from manifesting because "The Author" thought the joke was in poor taste and would potentally alienate Scarterra's many fans.
Until something known as "a difficult Summer Camp prompt" pushed Isekai Island through the "Fourth Wall" and into existence.

by me with Midjourney

Tourism

Some believe Isekai Island is a paradise realm set to pamper every whim of "The Author".