Penari stole the Eye of Abarraden, and he became known as "the greatest thief in the history of Tai-tastigon." Theocandi was jealous of his older brother's reputation. Theocandi became a great thief himself, and in 2984 he became sirdan of the guild and proceeded to rule for just over 40 years. Penari was not jealous of Theocandi in return, much to Theocandi's anger.
In 3019, when Theocandi was up for re-election, he worked with Ishtier to create a Shadow Thief to kill Master Tane, his chief rival. During the same election, he took Bane as his apprentice to get the vote of Abbotir, Master Gold. Thusly, Theocandi won that election.
↑God Stalk, Book I: Tatters of Dusk, "Chapter 4: The Heart of the Maze" — "Forty years of power and easy victories showed"
↑God Stalk, Book II: Crown of Nights, "Chapter 5: Winter Days" — "Theocandi's forty year regime"
↑God Stalk, Book II: Crown of Nights, "Chapter 5: Winter Days" — "the life-long rivalry between the Sirdan and her new master. Theocandi had always been jealous of Penari's reputation and raged at his older brother's refusal to envy him his own position and power."
↑God Stalk, Book III: Shroud of Days, "Chapter 13: Three Pyres" — "seven years ago, during the priest's 'exchange of information' with Theocandi and just before the Sirdan's erstwhile rival, Master Tane, had fallen prey to the Shadow Thief."
↑God Stalk, Book II: Crown of Nights, "Chapter 5: Winter Days" — " '[Bane] was forced on Grandfather by his father, Abbotir of the Gold Court, just before the Guild Council meeting six years ago in return for political support.' "