Mine would probably be filled with fantasy elements.
Abilities that attack the soul seem like they'd be pretty effective.
For a fully mature black hole, time inside is completely still.
An example of time manipulation through the use of gravity manipulation is what black holes do. Gravitational time dilation, you could make an object going towards you take forever to reach you.
The ability to manipulate the web of fate and that which flows through it.
Say animancy, in some cases you can't reanimate dead creatures. In necromancy you can only resurrect the dead and control the dead. You can usually only do as the name suggests in most cases.
Depending on the type of magic there could be a price. To me that seems like a pretty jarring limitation.
Dreamt reality is definitely underrated. While it doesn't have plenty of applications it is overpowered as hell.
Hunting intuition, trap intuition, agriculture intuition.
Would the power to secrete poison work?
What counts as "natural"?
Horror- force field generation
Sleepy- dream manifestation
As an example you could ride clouds, make it rain, summon tornados, cause tsunamis, acid rain, limited temperature control, make water spouts. There is a wide variety of choices for use.
They could start out only being able to make minute changes, and will only get stronger by using subjective reality more and more.
They could only be able to make a certain number of changes in a period of time. Rendering them pretty much powerless for a period of time, unless they have other powers.
Just don't close your eyes. Unless your immune to your own optic beams.
Code Geass: Lelouch of the rebellion, with the power of gene-splicing. I could probably try and copy the geass and insert it into myself.