The Universe Arcana (宇宙?) is one of the most powerful Arcana in the Persona series. The Universe Arcana is commonly associated with Social Links, where its power is based upon the Protagonist's bonds with others. Much like the Aeon Arcana, the Universe is not part of the Rider-Waite Tarot Deck like the other arcana, rather, it is from the Thoth Deck, numbered XXI and replacing The World Arcana. The first and only known user of The Universe is the protagonist of Persona 3 where he was able to unleash its power to seal Nyx.