Magic Mirror (Thaumcraft 4)

The Magic Mirror is a block added by Thaumcraft 4. It is used in linked pairs to send items back and forth between one another, even across dimensions. In order to link mirrors, one of them must be placed in the world first and then right-clicked with the other one. Objects can then be thrown into or transported via other means like piping through the mirror. There is a chance that items may not make it through, though this may be remedied by sending CV into it.

Trivia

 * It is a reference to Terraria's Magic Mirror