A Broken Kounat Cube appears in the first room of Relics of Kounat. Destroying the Broken Kounat Cube is necessary for advancement in the dungeon, as the portal is covered by a gate that will only vanish when the Cube is destroyed (all damage on the gate is 1).
The Cube floats up and down, causing players to have to jump to attack it. No MP is gained from attacking the Broken Kounat Cube.
The Broken Kounat Cube has no attacks.