Obsidian platform

The obsidian platform is a 5×1×5 square of obsidian that generates when an entity enters the End through an end portal.

Generation
The obsidian platform always generates at coordinates (100, 48, 0), mostly far away from the island, making it tough to get there. Players who enter the End spawn at coordinates (100, 49, 0), facing west towards the main island; other entities that enter the End spawn at coordinates (100.5, 50, 0.5), in the middle of and 1 block higher than the platform. Sometimes the platform generates inside a case of end stone; enough end stone is replaced with air in this case so that the player can walk around, with 3 blocks high of breathing space. Occasionally the platform may generate in midair.

If the platform is destroyed, or if a block is placed on top of it, the platform is restored and any overlaying blocks on or within 3 blocks above the obsidian are replaced with air when an entity enters the End.

The obsidian platform only generates when an entity uses an end portal, not when teleporting with.