Allegiance is the bond between a soul and the god it serves.
A soul begins devoted to Mother, but allegiance is not permanent.
Souls can trade allegiances between gods. Each god offers a unique skill tree that is only available to its followers. These skill trees reflect the personalities and values of the gods themselves.
Some gods are benevolent. Some are neutral. Some are chaotic. Some are openly hostile.
Your choices shape not only your abilities but how the world responds to you.
Power always comes with tradeoffs.