Anti-builder

The Anti-builder is a block added by Twilight Forest. This block is found in the Dark Tower and is used to prevent the altering of blocks within a 9x9x9 block area. Whenever a block is placed on or near the Anti-builder it will be broken and dropped onto the ground, and if a block is broken around the Anti-builder, a glassy block that resembles an Anti-builder pattern will be replaced where the block once was. This behavior can be altered with the config, allowing certain blocks to be placed or destroyed within the Anti-builder area. Whenever a block is placed on or near the Anti-builder it will be broken and dropped onto the ground.

Anti-builders cannot be obtained, but can be broken.