You have gained access to the power system of the Norse god which is called Saga.
A saga is a tale of your accomplishment whether true or false. The recreation of important moments and major events in your story as abilities that you can draw upon. It is the distilled essence of the belief of other in you and what your story represents. This grants you abilities based on what you were famous for, the more widespread or stronger the belief in your legend is the more powerful your abilities become.
Each saga has its own synchro rate which indicates how much you live up to the legend and how well you can use the ability the saga gives you, The higher the synchro rate the more skillfully you can use your ability and can even open up new ways to use your ability based on your own interpretation and recontextualization of your legend.
You are not provided a saga in the beginning but must earn one yourself by performing a feat that at least a hundred people know about or convincing a hundred people that you have done the feat. The saga you gain can only get stronger with fame but not weaken due to the lack of it, the strength of the saga will always stay at the level of its peak popularity.