The Crystal Gate

The Crystal Gate is an area on Astro-Knights Island. It is where you will find Mordred's Fortress.

Role in Astro-Knights Island
Main Article: Astro-Knights Island

The Crystal Gate is located inside the astreiod field on Astro Knights island. It is aproxamately 7 seconds down from the pewter moon when it is on the bottom left corner of Poptropica. Once you enter the field the more smaller the rocks the farther away you are from the crystal gate. Eventually you will stumble across a huge asteroid that will have the crystal gate on it. Land there get off and climb your way up to the crystal gate. Once all of the Astro Knights that you have rescued are gathered with you it will be revealed that you are the Chosen One to pull the sword key out of the stone. A portal to another galaxy will open up and you will head to Mordred's planet.

Trivia

 * Even after the key is pulled out and dissapears inside the vortex, you can see it in the stone from in space.
 * After you complete Astro Knights, you can no longer enter the portal.