Magi Deity (三賢神；sankenjin, literally meaning "three wise deities") is a family debuted in BS52. As the name suggests, the family only has three Spirits, which are Hormis, Larvandad, and Gushnasaph. In lore, the Magi Deities are beings who look after the new world where Alex got into. They also seem to be very keen in supporting other Spirits, as seen in flavor texts.
In terms of reference, Hormis, Larvandad, and Gushnasaph are said to be the names of the three sages who visited the new-born Jesus in the Bible.