In God of War in Pandora's Temple, there's a cave upon the Cliffs of Madness that are booby-trapped with spikes that shoot from the floor that can kill any mortal instantly if caught. In that cave, Kratos gets the Necklace of Aphrodite. In God of War II the floor of the entrance hall of the Palace of the Fates is completely covered with holes that shoot up spikes at various spots. Also in the Palace of the Fates, there's a side room in the Phoenix Chamber where a set of large spikes can be lowered for a short period of time by pulling a lever. In that room, Kratos gets the Hail of Boreas.