Overwhelming Aegis is a form of Will Expressions that relies on the aura of its possessor to overwhelm the senses of those around them and render them Restrained, freezing them in their tracks. It uses either Awe (generally good or neutral entities) or Horror (generally malevolent or evil entities) to accomplish this. Against normal effects, the target uses their Charisma.
Powerful (gods, dragons, etc.) overwhelming aegis effects works against the Sanity of the target.