Marvel: Firewall

Tessa (Sage)
Sage is capable of creating her own unique cyberpathic-telepathic protection against other mental abilities. By erecting a psionic "firewall", Sage is able to effectively protect herself from mental attacks, probes, and detection of the mental variety while creating a defensive force that reflects any offensive mental action back at her attacker. Though by consciously closing off her mind by using his psionic feat, Sage inadvertently shut down her own telepathic abilities.