A "Houdini" anti-personnel mine.
An anti-personnel mine is a piece of military technology that is designed specifically to target and do the most damage possible to the personnel of an enemy force. Anti-personnel mines are used primarily as a defensive weapons and function as a force multiplier, allowing one force to present a threat to the enemy far outside the scope of what might otherwise be possible given the number of their own troops.
The Dominion deployed anti-personnel mines effectively during their conflict with the Federation, most notably on AR-558 where subspace mines, nicknamed Houdinis, exacted a terrible toll on the besieged Federation troops guarding that installation. (DS9: "The Siege of AR-558")