Both are, in action, very much similar but are utilized differently. First, the Carian Greatsword sorcery is much more expensive than its ash of war counterpart, sold for 10,00 Runes by Miriel, Pastor of Vows at the Church of Vows. Additionally, unlike its ash of war counterpart, which can be infused onto most swords, the sorcery requires you to have a staff catalyst as well as 24 Intelligence.