Border

Border blocks are unbreakable blocks that prohibit movement through, over or under them. They are exclusive to.

Info
To use type /worldbuilder or /ability worldbuilder true in chat

The border blocks are generally used to prevent students from entering a specific area. It can be placed or destroyed only by a player that has permission as a world builder.

It emits a single red particle. When placed, the block collision prevents the non-world builder player from getting through or placing a block, above and under the border block infinitely.

It is possible to get past Border Blocks by throwing an ender pearl or using commands. Only the Ender dragon can fly straight through but wont break them

It prevents:
 * Jumping over
 * Climbing over
 * Walking through
 * Flying over
 * Building over
 * Tunneling under
 * Destruction by players without world builder permission
 * Explosion Goes Through

Block loot
Border blocks require a pickaxe to be mined. If it is mined without a pickaxe, it drops nothing.

Trivia

 * Border blocks and walls share the same block models and inventory model.