It was the Web Hammer who used the spy and the markings on the door, doorpost, and walls of the rooms of the leaders of the gang to predict that assassins would be attacking tonight.
After confirming that things were exactly as they expected, Legion had their Web Hammer control the surviving assassin to kill himself and lift up the web. But they didn't give up their vigilance.
They didn't let the fact that they had neutralized an attack make them relax. Their Fast Hammer, who was a traveler and had the Seeking Danger divine ability and was sensitive to danger, was made to patrol the base while their Web Hammer got to work on building a powerful curse object.
The cursed object would serve as the vessel for a curse. By working on the vessel now, she would be able to use the curse when she needs it, and the curse will be very powerful.
