Catallus

Catallus is the Ultima pin for the Catallus Warp Rift and Dark Glass station, the Path of Heaven door Targutai Yesugei died opening so the White Scars could reach Terra. This map files the well as a planet under Ultima, not as a Sol-system moon.

Mortarion and Eidolon brought Death Guard and Emperor's Children. Torghun's Sagyar Mazan spent the Swordstorm as a fuse. Shiban held the void. Revuel Arvida walked the Webway out. Catallus is not the Kalium Gate and not a inhabited hive; the 'planet' is a rift with a mirror shell around a tester-throne.

Catallus still matters as the Scars' named escape rift. Unofficial fan summaries keep the ultima-segmentum parent and kind=planet, and they note Dark Glass was a station over that rift rather than a second pin.