ΰ§§ your childhood imaginary friend was actually a lonely deity, and they blessed you with powers because you never forgot them
ΰ§§ you were a victim of a localized reality glitch; your body plugged the leak in space, which is now anchored inside of you wherever you go
ΰ§§ you made a binding vow as a child that you then promptly forgot. the contract activated and gave you access to powers.
ΰ§§ you won a previously unbeatable combat/heavenly trial and now you carry the combined power of the others who failed before you.
ΰ§§ you were clinically dead for four minutes. you came back from the other side unharmed but not completely human
ΰ§§ you were chosen as a vessel for an ancient entity, but your soul was so dominant that you accidentally assimilated them and their powers into yourself
ΰ§§ you came across a forgotten forest while exploring as a child and drank from a well that wasn't meant to be drunk from
ΰ§§ your parent chose to give you their own powers upon retirement
ΰ§§ you were born with a natural deficiency in your soul, it doesn't hold boundaries allowing you to influence everything around you
ΰ§§ you inherited a debt where the universe demands that you must posses an immensely terrifying power to repay an act a great ancestor committed against reality.
ΰ§§ you caught a falling star in the sky still too hot to the touch and the cosmic rays instantly rewrote the wiring in your energy centers
ΰ§§ you fell asleep in a forest and woke up with a spare shadow that obeys your will.
ΰ§§ you survived a ritual gone wrong and ended up absorbing the energy meant to feed a god
ΰ§§ you received a curse that was not intended for you. as a defense mechanism your body has inversed the effect, and it turned into a sacred blessing
ΰ§§ you traded your emotions/soul/something precious for powers
ΰ§§ you solved an impossible puzzle that turned out to be the physical lock to a sealed form of ancient magic
ΰ§§ you're a cosmic being, you annoyed your sibling too much and got cursed to live a millennia as a human with powers you despise