The Sigil of Baphomet has been printed on the cover since the original publication. The 5th episode is titled "Sigil of the Baphomet". When her ability is active, a Geass sigil appears upon her forehead. When her ability is active, a Geass sigil appears on her forehead. In contrast to Perl, variables are not obligatorily prefixed with a sigil. Skill Trees&colon; Warfare, Lore, Sigil. Their headquarters is the insane asylum of Sigil, called the Gatehouse. In Perl % is the sigil for hashes. In CycL, variables are prefixed with a "codice 11" sigil. "Sigil", the "City of Doors", is located atop the "Spire" in the Outlands. Upon touching the sigil, he was transformed into the Ghost Rider. It is a new sigil described in the episode Vitus. A brief dissection of Clauneck's sigil helps glean insight into his nature. When used, the sigil changes the semantics of scope of the variable. Within Sigil there are philosophy-derived factions.