Ender Portal Frame

Air Portal Frame is a block that can be found in strongholds as of Beta 1.9 pre-release 3. It is likely that they will tie in with The Ender dimension through the creation of Air Portals. It is a non-solid block when cracked, becoming solid when repaired. They cannot be mined, however an explosion will cause them to drop as an item shaped like a Glass Pane. They have no tooltip, indicating that them dropping at all might be a bug. The player can repair a cracked Air Portal Frame by right clicking it with an Eye of Ender.There is always a small pool of Lava directly under the portal frame. The name, "Air Portal" is not an official name for the portal, as it was just released as part of Beta 1.9 Pre-Release 3.

Trivia

 * The frame block cannot be moved using pistons.