I sent a message to Mordecai, describing the symbol. Mordecai: That’s a control sigil. Only you can see it because of your Escape Plan skill. They’re mostly used by secondary programs, like Vengeance of the Daughter. But they’re sometimes used by the dungeon creators, too. I don’t know too much about this stuff, but I know their use is considered sloppy programming because they’re easy to break. Sigils have all sorts of uses, but they’re typically for controlled gating. They can stop a specific type of mob from passing the symbol. They can be turned off and on by the showrunners, not the
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