The Icicle Towers, also known as the Frozen Swords by the Fallen, was the target for the House of Storms attack on Europa. It was a Golden Age Exo facility, having previously belonged to the Deep Stone Order, abandoned by Humanity in the Collapse. The Icicle Towers were destroyed after Fireteam Argus' showdown with Rhall deep inside the facility. Even though the Exo factory was destroyed, the House of Storms managed to save the blueprints for Exo prototypes, intending to reawaken the ancient forges on Io to use them and create an army.