Angels - S

Seals = A Seal is anything used to shut something off from the world and keep it there. Seals are often filled with holy power and many of them are the subject of prophecy. When a Seal is broken, often some of the Angelic Host will be able to feel it and respond. 
Second War = The Second War In Heaven was fought between the Angelic Hosts and the Pagan Gods. The Pagan Gods, alien spirits who had grown powerful by feeding on the worship of lesser beings, had come to believe in their own false divinity and attempted to merge Heaven with their own strange homeland. The Loyalist Angels defeated them in battle and the Pagan Gods were driven back down to Earth. Because Earth was the province of Man, the Angels did not drive the Pagan Gods from Earth but instead bided their time. That patience paid out, with the rise of the Adept Orders, the Midnight Crusade was launched and resulted in the final destruction of the empire of the Pagan Gods.
Sentinels = These specialized Angels, who look to St. Michael the Archangel for their origins, are the Patron of all those who enforce the Law. Police, investigators and military peacekeepers are all watched over and joined by these dedicated Angels. For more info see the Sentinels Chapter. 
Seraphim = The highest Choir of Angels as recorded in traditional Judeo-Christian Angelology, the 'Fire Makers' stand before the Throne of Almighty God and sing His praises. For more info see The Seraphim.
Songs = Angels love to sing and their songs are charged with Celestial power that can effect changes in reality itself. Depending on the rank, power and purpose of an Angel, their song can accomplish a variety of supernatural effects.