I like idea about Void element... maybe it should be unlocked at Sorcery, being something like metamagic for Dao ? Not very powerful itself, but improving existing spells and units, like Mikka said. It's not exactly a civilization thing, but rather religion one, but I think it fits here - White Hand could use upgrade to Frosting Rider. Right now, they are somewhat lacking in units department - other units offer better units. It's mostly a gameplay thing but should be ok with lore : EDIT: Something about Disciples of the Hand, from Age of Ice: Spoiler AoI civilopedia, Disciple of Mulcarn entry : The Frost Speakers, disciples of Mulcarn, were tolerated by most nations in the Age of Magic. They would pledge allegiance to no sovereign, but they did not speak sedition, either. Well beyond stoic in their demeanor, followers of Winter lost passion of all sorts. Initiation to this order involved bathing in icy waters overnight. Those who survived the 'baptism' usually had their outlook changed dramatically by it, without need of theological debate. These cold men now lead the armies of their god. Slow to adapt to their enemies' tactics, their strength lies in unflinching rationality, carrying out their plans unhindered by fear, ambition, or personal attachment. They will patch up wounded soldiers with divine aid of their god-king, but evidence suggests their compassion is something to be desired. More than once Amurite recon patrols have found badly wounded Illian warriors buried in the snow--occasionally still breathing.