Echo Block

The Echo Block is a translucent block which turns completely invisible once placed. Echo Blocks are sold by the Cyborg NPC when he is housed in a Graveyard Biome. Once placed, the Echo block cannot be seen by the player unless they have the Spectre Goggles equipped. Spectre Goggles are an accessory which, when equipped, allows the player to see placed Echo blocks.

The Spectre Goggles are also sold by the Cyborg when he is housed in a Graveyard Biome. Echo Blocks work similarly to most blocks as they can be hammered, actuated with an Actuator, and can be stood on or used to hoik.

Tips
Echo Blocks can be used for various building related tasks such as:


 * attempting to make Objects appear as if they are floating.


 * Echo Blocks can also stop Liquids, allowing them to 'float' in midair.


 * Hiding secret messages or symbols.
 * Having valid NPC housing with seemingly open areas and nonexistent walls

Trivia

 * Echo Blocks can be painted but you can still only see them while having the Spectre Goggles equipped.