Fable II Walkthrough

It's here where Garth will start to conjure up the cullis gate, rendering him unable to fight. A percentage meter in the lower-right corner of the screen measures his progress, though it'll stop rising if you let enemies get to Garth. At the beginning of the battle, you can stand atop the area where the cullis gate is forming and simply cast mid-level radius effect Will spells (like Shock) to keep the spire guards at bay.

However, more powerful enemies—ones that have Will of their own—will start showing up and dashing your dream of just standing still and pressing the Will button. When you see a Will-casting enemy, immediately charge with flourish attacks to take 'em down. Do your best to protect Garth, but don't worry too much if he gets hit. Garth getting hit only prolongs the battle, doesn't end it.

When the cullis gate is open, Garth will resume fighting by your side. The enemy's seems to spawn indefinitely, but you can end the scene by hopping into the cullis gate and transporting to Wraithmarsh.