The Twin Powers are a couple of married deities, Laar the Lawgiver, and Rigidine the Enforcer, who used the Staff of Law to banish the Rogue Gods to Maelstrom. They live in the starry realm of Asterion. They had two children: Lex, the letter of the Law, and Pneuma, the spirit of the Law.
Laar and Rigidine were slain by Asmodeus after Ignatius of New Haven promised him The Vale in a pact sealed with his blood, with his Pentagram of Cania. From that moment, the Twin Powers became Lex and Pneuma. Asmodeus has since been slain by the Heroes of Crucibal but since it was not on his home plane, there may be a chance he will return to power.
After the liberation of the four archangels, The Dark was weakened and the power of Lex and Pneuma was released into New Crucibal once more. This was all due to the New Heroes of New Crucibal.