Lightning Warp makes bosses disappear

Normally I would agree this is the correct course of action, considering the point of this skill is to kill the enemy. However!! I do not expect the boss to disappear to the unknown depths of Hades right before my very eyes. These bosses must be magical cause they just go 'poof!'.

Thankfully, loot still drops after. But which circle of hell the boss has entered is still unknown.