Warriors Orochi 4 had a mechanic called Deification for plot important characters like Lu Bu, Nobunaga Oda, Zhao Yun, Yukmura Sanada, etc. The idea being that the Norse and Greek gods, in reviving the previous crossover world created by the Chinese and Japanese mythological figures, put their power in the form of bracelets to keep the crossover world from collapsing in on itself a second time
Only 8 characters out of about 150 got fancy forms and new movesets.
Tyr - The Asgardian god of war, this bracelet was used by Yukimura Sanada, renowned for his skills in battle.
Freyja - The Asgardian goddess of Love, this bracelet was used by Guan Yinping, who has a deep bond with her family.
Thor - The Asgardian god of Thunder, this bracelet was used by Lu Bu, whose strength and skills are unmatched by others.
Apollo - The Olympian god of light and sun and protector from evil, this bracelet was used by Zhao Yun, who protected both leaders of Shu.
Poseidon - The Olympian god of the Seas, this bracelet was used by Cao Pi, renowned for his calm and calculating presence.
Aphrodite - The goddess of beauty of Olympus, this bracelet was used by Naotara Ii, head of the Ii family and loyal vassal of Ieyasu Tokugawa.
Hermes - The god of trickery and wisdom and messenger of the Olympian gods, this bracelet was used by Mitsunari Ishida, retainer of Hideyoshi Toyotomi renowned for his resourcefulness.
Izanagi - This bracelet, cursed with death, was worn by Nobunaga Oda, the Demon King, one of Japan's Three Unifiers, who uses it to gain power.
You might like the concept OP, I felt like it excluded a lot of characters.