Hope this is an interesting power and fits the setting.
Known Name: Baya, Life-giver, The Swarm Below
Actual Name: (Pm this information, as knowledge of this allows certain mechanics to be activated)
Ideals: Change and growth, celebration of life and intelligence in all it's forms. Constant striving to become better, experience new things and overturn existing norms. Change can take a long time, but it must be ongoing, forever. Monsters, murder, gluttony and destruction (among other things) are perfectly reasonable things to strive towards.
Repulsive Ideas: Slavery and dependance, whether to other people or ideas, including her own. Forces which stifle change are also to be overcome, or more accurately they will be overcome and her followers help it along. Most forms of necromancy or robotics would be opposed, particularly if it is mindless, widespread or stagnant.
History: Baya is a primordial entity who formed and was formed by the first living things in the world/universe. She helped in the creation of the biosphere of the world and the many wonderful things inside it, though not any intelligent creatures, 'mortals' were created by others. Through infesting and reviving corpses as avatars she gained an understanding and interest in intelligent creatures.
She considered all life an extension of herself and was confused by the suffering intelligence caused. She offered mortals power and new forms in a quest for improvement. Baya considered tricking or forcing people a form of self deception, though every pact made with her would result in inevitable corruption into a new form.
She was part of a pantheon of many primordial beings and was one of the last ones to be destroyed or exiled by new gods and powerful mortals. She made a deal with the powers that were banishing the first gods to go deep under the ground and sleep as long as they held power, in exchange her followers would be allowed to live in peace. The deal was accepted as no one really knew the extent of her power to create new monsters or even end life. Baya's sleep is self imposed but no less powerful for it, she keeps her word, though if her followers were harassed or the gods weaken then...
Statistics
Intelligence: 0(Mindless swarm intelligence combined with thousands of separate minds imprinted on over eons)
Guile: -5(Truthful to the point of blunt, often over unsettling things)
Will: 0(Has long term plans, but easily distracted)
Luck: -5(It is the place of mortals to change their own fate or suffer what may)
Power: +10(Never even really stopped creating things while asleep)
Physically made of millions(billions, trillions?) of slimy worms/bugs/things living underground and spread across wide areas, could (before sleeping) infest and revive corpses who died before their time for a temporary avatar.