Facing the room, look to the right at a hole in the wall. The shortcut to Lost Izalith is in Demon Ruins just outside the room where the Demon Firesage boss was encountered. Just so, How do I get the Izalith shortcut? After reaching rank +2, players also attain the Chaos Storm (an upgraded version of Firestorm) as well as access to the shortcut to Lost Izalith (the shortcut can be found to the right, before the Demon Firesage boss in the Demon Ruins).
Attain the Great Chaos Fireball pyromancy upon joining.
