Spider-Girl had escaped alive. This would be a major setback for Seth's plans. It also testified to Ravian's ineffectiveness as an assassin. The boy was a thief, Seth thought. A good thief, but nothing more. He had no future in Seth's organization.
"Agent Saturn," Seth said to the white-haired immortal beside him. "Wipe his memory. He cannot remember anything about us or how he got into Steel City. Our use for him is finished."
The telepathic girl used the ultimate form of her power to follow Seth's orders. Even though she was sitting miles away, she could reach out and touch someone's mind (as long as it was someone she had formed a bond with). Then, she could tear memory from that mind.
Ravian would be lost.