The Dynamism Tablet is a tile entity added by Thaumic Tinkerer. It is used to automatically simulate right and left clicks on the block it is facing. It can be controlled using redstone signals.
The item it right or left clicks with can be added in its GUI. The button in the GUI's bottom controls can control whether the block turns off when it receives a redstone signal, or only performs the desired simulation when it receives a redstone signal. The GUI's right and left buttons can be used to specify whether to perform a right click or a left click.