Gods of Ragnarok's universe

The Record of Rassilon speculated that the Gods of Ragnarok had come from a universe before the Great Old Ones' universe, and had been destroying every universe since. (PROSE: Divided Loyalties)

Behind the scenes

 * In his notes for The Quantum Archangel, Craig Hinton asserts that the Gods of Ragnarok came from the universe before the Great Old Ones' universe, and were one half of that universe's Six-Fold-God alongside the Gods of Armageddon (Arma, Gedd, and Onn). Much like the Six-Fold-God of the Doctor's universe, they were the equivalent of the Time Lord High Council of their reality, with Hinton saying that one of the Gods of Armageddon must have been their universe's version of the Doctor. (Shelf Notes)